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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM 8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CURRENT REPORT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="padding-right: 0; font-size: 10pt; padding-left: 0; text-indent: 0">Date of Report (Date of earliest event reported) </TD>
    <TD COLSPAN="3" STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; font-size: 10pt; padding-left: 0; text-indent: 0">October 16, 2012</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; padding-left: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">BANCFIRST CORPORATION</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">(Exact name of registrant as specified in its charter)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">OKLAHOMA</TD>
    <TD COLSPAN="3" STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">0-14384</TD>
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">73-1221379</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 0; font-size: 10pt; text-align: center; text-indent: 0">(State or other jurisdiction <BR> of incorporation)</TD>
    <TD COLSPAN="3" STYLE="padding: 3pt 0; font-size: 10pt; text-align: center; text-indent: 0">(Commission<BR> File Number)</TD>
    <TD STYLE="padding: 3pt 0; font-size: 10pt; text-align: center; text-indent: 0">(I.R.S. Employer<BR> Identification No.)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="4" STYLE="border-bottom: windowtext 1pt solid; padding-top: 3pt; padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">101 North Broadway, Oklahoma City, Oklahoma</TD>
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; padding-left: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; text-align: center; margin-bottom: 0pt; padding-top: 3pt">73102</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="4" STYLE="padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">(Address of principal executive offices)</TD>
    <TD STYLE="padding-right: 0; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">(Zip Code)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="padding-right: 0; font-size: 10pt; padding-left: 0; text-indent: 0">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 0; font-size: 10pt; padding-left: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3" STYLE="padding-right: 0; font-size: 10pt; padding-left: 0; text-indent: 0">Registrant&rsquo;s telephone number, including area code</TD>
    <TD COLSPAN="2" STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; font-size: 10pt; padding-left: 0; text-indent: 0">(405) 270-1086</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="border-bottom: windowtext 1pt solid; padding-right: 0; padding-left: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-bottom: 3pt; font-size: 10pt; text-align: center; padding-left: 0; text-indent: 0">(Former name or former address, if changed since last report.)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="5" STYLE="padding-right: 0; padding-left: 0; font-size: 10pt; text-indent: 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT> Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</TD></TR>
<TR>
    <TD STYLE="width: 32%; padding-right: 0; padding-left: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 6%; padding-right: 0; padding-left: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 5%; padding-right: 0; padding-left: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 23%; padding-right: 0; padding-left: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 34%; padding-right: 0; padding-left: 0; text-indent: 0">&nbsp;</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Results of Operations and Financial
Condition, Financial Statements and Exhibits</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 2.02. Results of Operations and
Financial Condition.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>BancFirst Corporation Reports Third
Quarter Earnings</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">On October 16, 2012,
BancFirst Corporation announced its results of operations for the quarter ended September 30, 2012. A copy of the related press
release is being filed as Exhibit 99.1 to this Form 8-K and is incorporated herein by reference in its entirety.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 9.01. Financial Statements and
Exhibits.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify"><B>&nbsp;</B></P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 12%; padding-right: 5.4pt; padding-left: 0; font-size: 10pt; font-weight: bold; text-align: justify">(c)</TD>
    <TD STYLE="width: 85%; padding-right: 5.4pt; padding-left: 0; font-size: 10pt; font-weight: bold; text-align: justify">Exhibits.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; font-size: 10pt; font-weight: bold; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; font-size: 10pt; font-weight: bold; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; font-size: 10pt; font-weight: bold; text-decoration: underline; text-align: justify">Exhibit No.</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; font-size: 10pt; font-weight: bold; text-decoration: underline; text-align: justify">Description</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">99.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Press Release, dated October 16,
2012, issued by BancFirst Corporation titled &ldquo;BancFirst Corporation Reports Third Quarter Earnings.&rdquo;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 22.5pt">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.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&#9;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 53%; padding-right: 5.4pt; padding-left: 0; font-weight: bold; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 47%; padding-right: 5.4pt; padding-left: 0; font-weight: bold; text-decoration: underline; text-align: justify">BANCFIRST CORPORATION</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Registrant)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">Date: <U>October 16, 2012</U></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify; border-bottom: Black 1pt solid">/s/ Joe T. Shockley, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">Joe T. Shockley, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">Executive Vice President</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 0; text-align: justify">Chief Financial Officer</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported)
October 16, 2012
BANCFIRST CORPORATION
(Exact name of registrant as specified in its charter)
OKLAHOMA
0-14384
73-1221379
(State or other jurisdiction
of incorporation)
(Commission
File Number)
(I.R.S. Employer
Identification No.)
101 North Broadway, Oklahoma City, Oklahoma
73102
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including area code
(405) 270-1086
(Former name or former address, if changed since last report.)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):
¨
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Results of Operations and Financial
Condition, Financial Statements and Exhibits
Item 2.02. Results of Operations and
Financial Condition.
BancFirst Corporation Reports Third
Quarter Earnings
On October 16, 2012,
BancFirst Corporation announced its results of operations for the quarter ended September 30, 2012. A copy of the related press
release is being filed as Exhibit 99.1 to this Form 8-K and is incorporated herein by reference in its entirety.
Item 9.01. Financial Statements and
Exhibits.
(c)
Exhibits.
Exhibit No.
Description
99.1      Press Release, dated October 16,
2012, issued by BancFirst Corporation titled "BancFirst Corporation Reports Third Quarter Earnings."
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.
BANCFIRST CORPORATION
(Registrant)
Date:
October 16, 2012
/s/ Joe T. Shockley, Jr.
Joe T. Shockley, Jr.
Executive Vice President
Chief Financial Officer