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<FONT FACE="Courier New" SIZE=2><P>                            SECURITIES AND EXCHANGE COMMISSION</P>
<P>                                     450 Fifth Street, NW</P>
<P>                                     Washington, DC  20549</P>

<P>                        ------------------------------------------</P>

<P>                                          FORM 8-K</P>
<P>                                       CURRENT REPORT</P>

<P>                           Pursuant to Section 13 or 15(d) of the</P>
<P>                              Securities Exchange Act of 1934</P>

<P>                              For the Month of October, 2001</P>

<P>                                               </P>
<P>                              MORTGAGE PASS-THROUGH CERTIFICATES,</P>
<P>                                     SERIES:  2001-ms11</P>
<P>                 (Exact name of the registrant as specified in charter)</P>

<P>                 Delaware                333-72879-20            94-2528990</P>
<P>               (State or other         (Commission          (IRS Employer</P>
<P>               jurisdiction of         File Number)         Identification</P>
<P>               Incorporation)                               Number)</P>

<P>&nbsp;</P>
<P>                                   75 NORTH FAIRWAY DRIVE</P>
<P>                                   VERNON HILLS, IL  60061</P>

<P>                         (Address of principal executive offices)</P>

<P>                    Registrant's telephone number, including area code:</P>

<P>                                      (847) 549-6500</P>

<P>&nbsp;</P>
<P>&nbsp;</P>
<P>ITEM 5.</P>

<P>     See Exhibit 99, the Distribution Report for the Month of October, 2001,</P>
<P>attached hereto.</P>

<P>ITEM 7.</P>

<P>    FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION, AND EXHIBITS:</P>

<P>&nbsp;</P>
<P>     EXHIBITS:</P>

<P>     A.   (null), Mortgage Pass-Through Certificates,</P>
<P>          SERIES:  2001-ms11 , Monthly Distribution Report for October 2001.</P>

<P>                                SIGNATURES   </P>

<P>Pursuant to the requirements of the Securities Exchange Act of 1934, the</P>
<P>registrant has duly caused this report to be signed on its behalf by the</P>
<P>undersigned hereunto duly authorized.</P>

<P>Dated:    November  7, 2001</P>

<P>                                  WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.</P>
<P>                                              (Registrant)</P>

<P>                                              By:   </P>
<P>                                                    ------------------</P>
<P>                                                    RICHIE MOORE</P>
<P>                                                    SECOND VICE PRESIDENT</P>
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SECURITIES AND EXCHANGE COMMISSION
450 Fifth Street, NW
Washington, DC  20549
------------------------------------------
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
For the Month of October, 2001
MORTGAGE PASS-THROUGH CERTIFICATES,
SERIES:  2001-ms11
(Exact name of the registrant as specified in charter)
Delaware                333-72879-20            94-2528990
(State or other         (Commission          (IRS Employer
jurisdiction of         File Number)         Identification
Incorporation)                               Number)
75 NORTH FAIRWAY DRIVE
VERNON HILLS, IL  60061
(Address of principal executive offices)
Registrant's telephone number, including area code:
(847) 549-6500
ITEM 5.
See Exhibit 99, the Distribution Report for the Month of October, 2001,
attached hereto.
ITEM 7.
FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION, AND EXHIBITS:
EXHIBITS:
A.   (null), Mortgage Pass-Through Certificates,
SERIES:  2001-ms11 , Monthly Distribution Report for October 2001.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.
Dated:    November  7, 2001
WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
(Registrant)
By:
------------------
RICHIE MOORE
SECOND VICE PRESIDENT