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      Iron Mountain S8
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">As
        filed
        with the Securities and Exchange Commission on November 15, 2006</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Registration
        No.
        333-&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman, serif"><strong>UNITED
        STATES</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman, serif"><strong>SECURITIES
        AND EXCHANGE COMMISSION</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>WASHINGTON,
        D.C. 20549</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman, serif"><strong>FORM
        S-8</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>REGISTRATION
        STATEMENT</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>UNDER
        THE</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SECURITIES
        ACT OF 1933</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman, serif"><strong>IRON
        MOUNTAIN INCORPORATED</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Exact
        Name of Registrant as Specified in Its Charter)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Delaware</strong></font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(State
                  or Other Jurisdiction of </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Incorporation
                  or Organization)</font></div>
              </td>
              <td valign="top" width="40%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>23-2588479</strong></font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(I.R.S.
                  Employer </font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Identification
                  No.)</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>745
        Atlantic Avenue, Boston, Massachusetts 02111</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Address
        of Principal Executive Offices including zip code)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Iron
        Mountain Incorporated 2002 Stock Incentive Plan</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Full
        Title of the Plan)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">C.
        Richard Reese</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Chairman
        of The Board of</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Directors
        and Chief Executive Officer</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Iron
        Mountain Incorporated</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">745
        Atlantic Avenue</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Boston,
        Massachusetts 02111</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(617)
        535-4766</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Name,
        Address and Telephone Number of Agent For Service)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>COPY
        TO:</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">William
        J. Curry, Esq.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Sullivan
        &amp; Worcester LLP</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">One
        Post
        Office Square</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Boston,
        Massachusetts 02109</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(617)
        338-2800</font></div><br>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>CALCULATION
        OF REGISTRATION FEE</strong></font>&#160;

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              <td valign="bottom" width="21%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Title
                  of Each Class of Securities to be Registered</strong></font></div>
              </td>
              <td valign="bottom" width="13%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Amount
                  to be Registered(1)</strong></font></div>
              </td>
              <td valign="bottom" width="14%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Proposed
                  Maximum Offering Price Per Share(2)</strong></font></div>
              </td>
              <td valign="bottom" width="15%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Proposed
                  Maximum Aggregate Offering Price(2)</strong></font></div>
              </td>
              <td valign="bottom" width="16%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Amount
                  of Registration Fee</strong></font></div>
              </td>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Common
                  Stock, $0.01 par value per share</font></div>
              </td>
              <td valign="top" width="13%" style="border-bottom: black thin solid;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">3,323,728.50</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
              </td>
              <td valign="top" width="14%" style="border-bottom: black thin solid;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">$43.18</font></div>
              </td>
              <td valign="top" width="15%" style="border-bottom: black thin solid;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">$143,518,596.63</font></div>
              </td>
              <td valign="top" width="16%" style="border-bottom: black thin solid;">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">$15,357</font></div>
              </td>
            </tr>

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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(1)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">In
        accordance with Rule&#160;416 under the Securities Act of 1933, this
        registration statement shall be deemed to cover any additional securities
        that
        may from time to time be offered or issued to prevent dilution resulting
        from
        stock splits, stock dividends or similar transactions.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(2)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        proposed maximum offering price per share and the proposed maximum aggregate
        offering price have been estimated solely for the purpose of calculating
        the
        amount of the registration fee in accordance with Rules 457(c) and 457(h)
        under
        the Securities Act of 1933 on the basis of the average of the high and low
        prices of the Common Stock on the New York Stock Exchange on November 10,
        2006.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        prospectus meeting the requirements of Section 10(a) of the Securities Act
        of
        1933, as amended, which is being provided to participants in the Iron Mountain
        Incorporated 2002 Stock Incentive Plan in conjunction with this registration
        statement also relates to the shares registered under the Registration Statement
        on Form S-8 dated May 24, 2002 (File No. 333-89008), as amended by
        Post-Effective Amendment No. 1 to Form S-8 dated June 3, 2005, the Registration
        Statement on Form S-8 dated August 18, 2004 (File No. 333-118322), as amended
        by
        Post-Effective Amendment No. 1 to Form S-8 dated June 3, 2005, and the
        Registration Statement on Form S-8 dated November 12, 2004 (File No.
        333-120395), as amended by Post-Effective Amendment No. 1 to Form S-8 dated
        June
        3, 2005, of Iron Mountain Incorporated.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Registration
        of Additional Securities - Explanatory Note </strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">We
        are
        filing this registration statement to register an additional
        3,323,728.50</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">shares
        of
        our common stock for issuance under the Iron Mountain Incorporated 2002 Stock
        Incentive Plan (the &#8220;Plan&#8221;). The increase in the number of shares authorized for
        issuance under the Plan was approved by our stockholders at our 2006 annual
        meeting held on May 25, 2006. On May 24, 2002 we filed a registration statement
        on Form S-8 (File No. 333-89008), as amended by Post-Effective Amendment
        No. 1
        to Form S-8 dated June 3, 2005, covering 1,352,543 shares of our common stock
        (as adjusted to 2,028,814.5 to reflect our three-for-two stock split effective
        June 30, 2004), and on August 18, 2004 we filed a registration statement
        on Form
        S-8 (File No. 333-118322), as amended by Post-Effective Amendment No. 1 to
        Form
        S-8 dated June 3, 2005, covering an additional 2,000,000 shares of our common
        stock, and on November 12, 2004 we filed a registration statement on Form
        S-8
        (File No. 333-120395), as amended by Post-Effective Amendment No. 1 to Form
        S-8
        dated June 3, 2005, covering an additional 1,000,000 shares of our common
        stock
        (collectively, the &#8220;Prior Registration Statement&#8221;), authorized for issuance
        under the original version of the Plan, as amended, with the Securities and
        Exchange Commission (the &#8220;Commission&#8221;). Pursuant to General Instruction E to
        Form S-8, the contents of the Prior Registration Statement are incorporated
        herein by reference, except for Item 3 and Item 8 of the Prior Registration
        Statement, which are being updated by this registration
        statement.</font></div><br>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>PART
        II</strong></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>INFORMATION
        REQUIRED IN THE REGISTRATION STATEMENT</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
        3. Incorporation of Documents by Reference.</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        following additional documents, which have been filed by us with the Securities
        and Exchange Commission, are incorporated by reference in and made a part
        of
        this registration statement, as of their respective dates:</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(a)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Our
        Annual Report on Form 10-K for the fiscal year ended December 31, 2005, filed
        on
        March 16, 2006 (except for Items 1, 2, 7 and 15, which are incorporated by
        reference from our Current Report on Form 8-K filed May 22, 2006);</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(b)&#160;<font id="TAB2" style="LETTER-SPACING: 9pt">&#160;&#160;&#160;</font>&#160;&#160;
        </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Our
        Quarterly Reports on Form 10-Q for the quarter ended March 31, 2006, filed
        on
        May 10, 2006, for the quarter ended June 30, 2006, filed on August 9, 2006,
        and
        for the quarter ended September 30, 2006, filed on November 9,
        2006;</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Our
        Current Reports on Form 8-K filed on March 9, 2006, April 4, 2006, May 22,
        2006,
        May 31, 2006, June 1, 2006, June 9, 2006, June 23, 2006, July 11, 2006, July
        12,
        2006, July 13, 2006, July 20, 2006, July 28, 2006, August 29, 2006, October
        5,
        2006 and October 17, 2006; and</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(d)</font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 27pt">&#160;
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        description of our common stock contained in the registration statement on
        Form
        8-A filed on May 27, 1997 (File No. 1-13045), as amended by Amendment No.
        1 to
        Form 8-A filed on June 3, 2005 and all further amendments or reports filed
        for
        the purpose of updating such description.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">All
        documents subsequently filed by us pursuant to Sections 13(a), 13(c), 14
        and
        15(d) of the Securities Exchange Act of 1934, as amended, prior to the filing
        of
        a post-effective amendment which indicates that all securities offered have
        been
        sold or which deregisters all securities then remaining unsold, shall be
        deemed
        to be incorporated by reference in this registration statement and to be
        part
        hereof from the date of filing of such documents.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Any
        statement contained in a document incorporated or deemed to be incorporated
        by
        reference herein shall be deemed to be modified or superseded for purposes
        of
        this registration statement to the extent that a statement herein, or in
        any
        subsequently filed document which also is or is deemed to be incorporated
        by
        reference, modifies or supersedes such statement. Any statement so modified
        or
        superseded shall not be deemed, except as so modified or superseded, to
        constitute a part of this registration statement.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left">
          </div>
        </div>
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          <div style="WIDTH: 100%; TEXT-ALIGN: center">
          </div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
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        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right">
          </div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
        8. Exhibits.</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
        following exhibits are filed as part of this registration
        statement:</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>EXHIBIT
        INDEX</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">

            <tr>
              <td colspan="2" valign="top" width="13%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>EXHIBIT
                  NO.</strong></font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
              <td align="left" valign="top" width="67%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>DESCRIPTION</strong></font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="3%">&#160;</td>
              <td align="left" valign="top" width="9%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">5.1</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
              <td align="left" valign="top" width="67%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Opinion
                  of Sullivan &amp; Worcester LLP.*</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="3%">&#160;</td>
              <td align="left" valign="top" width="9%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">23.1</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
              <td align="left" valign="top" width="67%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Consent
                  of Sullivan &amp; Worcester LLP (contained in the opinion of Sullivan
                  &amp; Worcester LLP filed herewith as Exhibit 5.1).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="3%">&#160;</td>
              <td align="left" valign="top" width="9%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">23.2</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
              <td align="left" valign="top" width="67%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Consent
                  of Deloitte &amp; Touche LLP.*</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="3%">&#160;</td>
              <td align="left" valign="top" width="9%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">23.3</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
              <td align="left" valign="top" width="67%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Consent
                  of RSM Robson Rhodes LLP (Iron Mountain Europe Limited (f/k/a Britannia
                  Data Management Limited)).*</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="3%">&#160;</td>
              <td align="left" valign="top" width="9%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">24</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
              <td align="left" valign="top" width="67%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Powers
                  of Attorney (included in the signature page to this registration
                  statement).</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              </td>
            </tr>

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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">___________</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">*
        filed
        herewith</font></div>
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          <div style="WIDTH: 100%; TEXT-ALIGN: center">
          </div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>SIGNATURES</strong></font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
        to the requirements of the Securities Act of 1933, the registrant certifies
        that
        it has reasonable grounds to believe that it meets all of the requirements
        for
        filing on Form S-8 and has duly caused this registration statement on Form
        S-8
        to be signed on its behalf by the undersigned, thereunto duly authorized,
        in the
        City of Boston, Commonwealth of Massachusetts, on the 15</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><sup>th</sup></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">
        day of
        November, 2006.</font>&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br>
        <div>
          <table cellpadding="0" cellspacing="0" width="100%">

              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
                <td align="left" valign="top" width="37%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>IRON
                    MOUNTAIN INCORPORATED</strong></font></div>
                </td>
                <td align="left" valign="top" width="6%">&#160;</td>
              </tr>
              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
                <td align="left" valign="top" width="37%">&#160;</td>
                <td align="left" valign="top" width="6%">&#160;</td>
              </tr>
              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
                <td align="left" valign="top" width="37%">&#160;</td>
                <td align="left" valign="top" width="6%">&#160;</td>
              </tr>
              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
                <td align="left" valign="top" width="37%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By:
                    </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>/s/
                    C. Richard Reese</u></font></div>
                </td>
                <td align="left" valign="top" width="6%">&#160;</td>
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              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
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                    Richard Reese</font></div>
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              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
                <td align="left" valign="top" width="37%">
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                    of The Board of Directors and Chief Executive Officer</font></div>
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              <tr>
                <td align="left" valign="top" width="36%">&#160;</td>
                <td align="left" valign="top" width="37%">&#160;</td>
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        to the requirements of the Securities Act of 1933, this registration statement
        on Form S-8 has been signed below by the following persons in the capacities
        and
        on the dates indicated. The undersigned officers and directors of the registrant
        hereby severally constitute and appoint C. Richard Reese and John F. Kenny,
        Jr.,
        and each of them acting singly, our true and lawful attorneys to sign for
        us and
        in our names in the capacities indicated below any and all amendments or
        supplements, whether pre-effective or post-effective, to this registration
        statement on Form S-8 and to file the same, with exhibits thereto and other
        documents in connection therewith, with the Commission, granting unto each
        of
        said attorneys, acting singly, full power and authority to do and perform
        each
        and every act and thing requisite or necessary to be done in and about the
        premises, as fully to all intents and purposes as he or she might or could
        do in
        person, hereby ratifying and confirming our signatures to said amendments
        to
        this registration statement signed by our said attorneys and all else that
        said
        attorneys may lawfully do and cause to be done by virtue hereof. </font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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            </tr>
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                  Financial
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[{"type": "S-8", "sequence": "1", "filename": "imis_s8.htm", "description": "IRON MOUNTAIN S8", "secsgml_size_bytes": 61219}]
{"company-data": {"conformed-name": "IRON MOUNTAIN INC", "cik": "0001020569", "assigned-sic": "4220", "irs-number": "232588479", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-138716", "film-number": "061218578"}, "business-address": {"street1": "745 ATLANTIC AVENUE", "city": "BOSTON", "state": "MA", "zip": "02111", "phone": "6175354766"}, "mail-address": {"street1": "745 ATLANTIC AVENUE", "city": "BOSTON", "state": "MA", "zip": "02111"}, "former-company": [{"former-conformed-name": "IRON MOUNTAIN INC/PA", "date-changed": "20000201"}, {"former-conformed-name": "PIERCE LEAHY CORP", "date-changed": "19960807"}]}
Iron Mountain S8
As
        filed
        with the Securities and Exchange Commission on November 15, 2006
Registration
        No.
        333-
UNITED
        STATES
SECURITIES
        AND EXCHANGE COMMISSION
WASHINGTON,
        D.C. 20549
FORM
        S-8
REGISTRATION
        STATEMENT
UNDER
        THE
SECURITIES
        ACT OF 1933
IRON
        MOUNTAIN INCORPORATED
(Exact
        Name of Registrant as Specified in Its Charter)
Delaware
(State
                  or Other Jurisdiction of
Incorporation
                  or Organization)
23-2588479
(I.R.S.
                  Employer
Identification
                  No.)
745
        Atlantic Avenue, Boston, Massachusetts 02111
(Address
        of Principal Executive Offices including zip code)
Iron
        Mountain Incorporated 2002 Stock Incentive Plan
(Full
        Title of the Plan)
C.
        Richard Reese
Chairman
        of The Board of
Directors
        and Chief Executive Officer
Iron
        Mountain Incorporated
745
        Atlantic Avenue
Boston,
        Massachusetts 02111
(617)
        535-4766
(Name,
        Address and Telephone Number of Agent For Service)
COPY
        TO:
William
        J. Curry, Esq.
Sullivan
        & Worcester LLP
One
        Post
        Office Square
Boston,
        Massachusetts 02109
(617)
        338-2800
CALCULATION
        OF REGISTRATION FEE
Title
                  of Each Class of Securities to be Registered
Amount
                  to be Registered(1)
Proposed
                  Maximum Offering Price Per Share(2)
Proposed
                  Maximum Aggregate Offering Price(2)
Amount
                  of Registration Fee
Common
                  Stock, $0.01 par value per share
3,323,728.50
$43.18
$143,518,596.63
$15,357
(1)
In
        accordance with Rule 416 under the Securities Act of 1933, this
        registration statement shall be deemed to cover any additional securities
        that
        may from time to time be offered or issued to prevent dilution resulting
        from
        stock splits, stock dividends or similar transactions.
(2)
The
        proposed maximum offering price per share and the proposed maximum aggregate
        offering price have been estimated solely for the purpose of calculating
        the
        amount of the registration fee in accordance with Rules 457(c) and 457(h)
        under
        the Securities Act of 1933 on the basis of the average of the high and low
        prices of the Common Stock on the New York Stock Exchange on November 10,
        2006.
The
        prospectus meeting the requirements of Section 10(a) of the Securities Act
        of
        1933, as amended, which is being provided to participants in the Iron Mountain
        Incorporated 2002 Stock Incentive Plan in conjunction with this registration
        statement also relates to the shares registered under the Registration Statement
        on Form S-8 dated May 24, 2002 (File No. 333-89008), as amended by
        Post-Effective Amendment No. 1 to Form S-8 dated June 3, 2005, the Registration
        Statement on Form S-8 dated August 18, 2004 (File No. 333-118322), as amended
        by
        Post-Effective Amendment No. 1 to Form S-8 dated June 3, 2005, and the
        Registration Statement on Form S-8 dated November 12, 2004 (File No.
        333-120395), as amended by Post-Effective Amendment No. 1 to Form S-8 dated
        June
        3, 2005, of Iron Mountain Incorporated.
Registration
        of Additional Securities - Explanatory Note
We
        are
        filing this registration statement to register an additional
        3,323,728.50
shares
        of
        our common stock for issuance under the Iron Mountain Incorporated 2002 Stock
        Incentive Plan (the "Plan"). The increase in the number of shares authorized for
        issuance under the Plan was approved by our stockholders at our 2006 annual
        meeting held on May 25, 2006. On May 24, 2002 we filed a registration statement
        on Form S-8 (File No. 333-89008), as amended by Post-Effective Amendment
        No. 1
        to Form S-8 dated June 3, 2005, covering 1,352,543 shares of our common stock
        (as adjusted to 2,028,814.5 to reflect our three-for-two stock split effective
        June 30, 2004), and on August 18, 2004 we filed a registration statement
        on Form
        S-8 (File No. 333-118322), as amended by Post-Effective Amendment No. 1 to
        Form
        S-8 dated June 3, 2005, covering an additional 2,000,000 shares of our common
        stock, and on November 12, 2004 we filed a registration statement on Form
        S-8
        (File No. 333-120395), as amended by Post-Effective Amendment No. 1 to Form
        S-8
        dated June 3, 2005, covering an additional 1,000,000 shares of our common
        stock
        (collectively, the "Prior Registration Statement"), authorized for issuance
        under the original version of the Plan, as amended, with the Securities and
        Exchange Commission (the "Commission"). Pursuant to General Instruction E to
        Form S-8, the contents of the Prior Registration Statement are incorporated
        herein by reference, except for Item 3 and Item 8 of the Prior Registration
        Statement, which are being updated by this registration
        statement.
PART
        II
INFORMATION
        REQUIRED IN THE REGISTRATION STATEMENT
Item
        3. Incorporation of Documents by Reference.
The
        following additional documents, which have been filed by us with the Securities
        and Exchange Commission, are incorporated by reference in and made a part
        of
        this registration statement, as of their respective dates:
(a)
Our
        Annual Report on Form 10-K for the fiscal year ended December 31, 2005, filed
        on
        March 16, 2006 (except for Items 1, 2, 7 and 15, which are incorporated by
        reference from our Current Report on Form 8-K filed May 22, 2006);
(b)
Our
        Quarterly Reports on Form 10-Q for the quarter ended March 31, 2006, filed
        on
        May 10, 2006, for the quarter ended June 30, 2006, filed on August 9, 2006,
        and
        for the quarter ended September 30, 2006, filed on November 9,
        2006;
(c)
Our
        Current Reports on Form 8-K filed on March 9, 2006, April 4, 2006, May 22,
        2006,
        May 31, 2006, June 1, 2006, June 9, 2006, June 23, 2006, July 11, 2006, July
        12,
        2006, July 13, 2006, July 20, 2006, July 28, 2006, August 29, 2006, October
        5,
        2006 and October 17, 2006; and
(d)
The
        description of our common stock contained in the registration statement on
        Form
        8-A filed on May 27, 1997 (File No. 1-13045), as amended by Amendment No.
        1 to
        Form 8-A filed on June 3, 2005 and all further amendments or reports filed
        for
        the purpose of updating such description.
All
        documents subsequently filed by us pursuant to Sections 13(a), 13(c), 14
        and
        15(d) of the Securities Exchange Act of 1934, as amended, prior to the filing
        of
        a post-effective amendment which indicates that all securities offered have
        been
        sold or which deregisters all securities then remaining unsold, shall be
        deemed
        to be incorporated by reference in this registration statement and to be
        part
        hereof from the date of filing of such documents.
Any
        statement contained in a document incorporated or deemed to be incorporated
        by
        reference herein shall be deemed to be modified or superseded for purposes
        of
        this registration statement to the extent that a statement herein, or in
        any
        subsequently filed document which also is or is deemed to be incorporated
        by
        reference, modifies or supersedes such statement. Any statement so modified
        or
        superseded shall not be deemed, except as so modified or superseded, to
        constitute a part of this registration statement.
Item
        8. Exhibits.
The
        following exhibits are filed as part of this registration
        statement:
EXHIBIT
        INDEX
EXHIBIT
                  NO.
DESCRIPTION
5.1
Opinion
                  of Sullivan & Worcester LLP.*
23.1
Consent
                  of Sullivan & Worcester LLP (contained in the opinion of Sullivan
                  & Worcester LLP filed herewith as Exhibit 5.1).
23.2
Consent
                  of Deloitte & Touche LLP.*
23.3
Consent
                  of RSM Robson Rhodes LLP (Iron Mountain Europe Limited (f/k/a Britannia
                  Data Management Limited)).*
24
Powers
                  of Attorney (included in the signature page to this registration
                  statement).
___________
*
        filed
        herewith
SIGNATURES
Pursuant
        to the requirements of the Securities Act of 1933, the registrant certifies
        that
        it has reasonable grounds to believe that it meets all of the requirements
        for
        filing on Form S-8 and has duly caused this registration statement on Form
        S-8
        to be signed on its behalf by the undersigned, thereunto duly authorized,
        in the
        City of Boston, Commonwealth of Massachusetts, on the 15
th
day of
        November, 2006.
IRON
                    MOUNTAIN INCORPORATED
By:
/s/
                    C. Richard Reese
Name:
C.
                    Richard Reese
Title:
Chairman
                    of The Board of Directors and Chief Executive Officer
Pursuant
        to the requirements of the Securities Act of 1933, this registration statement
        on Form S-8 has been signed below by the following persons in the capacities
        and
        on the dates indicated. The undersigned officers and directors of the registrant
        hereby severally constitute and appoint C. Richard Reese and John F. Kenny,
        Jr.,
        and each of them acting singly, our true and lawful attorneys to sign for
        us and
        in our names in the capacities indicated below any and all amendments or
        supplements, whether pre-effective or post-effective, to this registration
        statement on Form S-8 and to file the same, with exhibits thereto and other
        documents in connection therewith, with the Commission, granting unto each
        of
        said attorneys, acting singly, full power and authority to do and perform
        each
        and every act and thing requisite or necessary to be done in and about the
        premises, as fully to all intents and purposes as he or she might or could
        do in
        person, hereby ratifying and confirming our signatures to said amendments
        to
        this registration statement signed by our said attorneys and all else that
        said
        attorneys may lawfully do and cause to be done by virtue hereof.
Signature
Title
Date
/s/
                  C. Richard Reese
C.
                  Richard Reese
Chairman
                  of the Board of Directors and Chief Executive Officer
(Principal
                  Executive Officer)
November
                  14, 2006
/s/
                  John F. Kenny, Jr.
John
                  F. Kenny, Jr.
Executive
                  Vice President, Chief Financial Officer and Director (Principal
                  Financial
                  Officer and Principal Accounting Officer)
November
                  14, 2006
/s/
                  Clarke H. Bailey
Clarke
                  H. Bailey
Director
November
                  14, 2006
/s/
                  Constantin R. Boden
Constantin
                  R. Boden
Director
November
                  7, 2006
/s/
                  Kent P. Dauten
Kent
                  P. Dauten
Director
November
                  14, 2006
/s/
                  Arthur D. Little
Arthur
                  D. Little
Director
November
                  9, 2006
/s/
                  Vincent J. Ryan
Vincent
                  J. Ryan
Director
November
                  8, 2006