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

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

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

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

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

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

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

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

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

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding-right: 5.75pt; font-size: 10pt">Date of Report (Date of earliest event reported) </TD>
    <TD STYLE="width: 50%; border-bottom: windowtext 1pt solid; padding-right: 5.75pt; font-size: 10pt; text-align: center">February 17, 2012</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
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    <TD STYLE="width: 100%; border-bottom: windowtext 1pt solid; padding-right: 5.75pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>BANCFIRST CORPORATION</B></P></TD></TR>
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    <TD STYLE="padding-right: 5.75pt; font-size: 10pt; text-align: center">(Exact name of registrant as specified in its charter)</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 33%; border-bottom: windowtext 1pt solid; padding-right: 5.75pt; font-size: 10pt; text-align: center">Oklahoma</TD>
    <TD STYLE="width: 34%; border-bottom: windowtext 1pt solid; padding-right: 5.75pt; font-size: 10pt; text-align: center">0-14384</TD>
    <TD STYLE="width: 33%; border-bottom: windowtext 1pt solid; padding-right: 5.75pt; font-size: 10pt; text-align: center">73-1221379</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3pt; padding-bottom: 3pt; font-size: 10pt; text-align: center">(State or other jurisdiction <BR> of incorporation)</TD>
    <TD STYLE="padding-top: 3pt; padding-bottom: 3pt; font-size: 10pt; text-align: center">(Commission<BR> File Number)</TD>
    <TD STYLE="padding-top: 3pt; padding-bottom: 3pt; font-size: 10pt; text-align: center">(I.R.S. Employer<BR> Identification No.)</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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    <TD STYLE="width: 67%; border-bottom: windowtext 1pt solid; padding-top: 3pt; padding-right: 5.75pt; font-size: 10pt; text-align: center">101 N Broadway, Oklahoma City, OK</TD>
    <TD STYLE="width: 33%; border-bottom: windowtext 1pt solid; padding-top: 3pt; padding-right: 5.75pt; font-size: 10pt; text-align: center">73102</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; font-size: 10pt; text-align: center">(Address of principal executive offices)</TD>
    <TD STYLE="padding-right: 5.75pt; font-size: 10pt; text-align: center">(Zip Code)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding-right: 5.4pt; font-size: 10pt">Registrant&rsquo;s telephone number, including area code</TD>
    <TD STYLE="width: 50%; border-bottom: windowtext 1pt solid; padding-right: 5.75pt; font-size: 10pt; text-align: center">(405) 270-1086</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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    <TD STYLE="width: 100%; border-bottom: windowtext 1pt solid; padding: 0">
        &nbsp;&nbsp;<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.75pt; padding-bottom: 3pt; font-size: 10pt; text-align: center">(Former name or former address, if changed since last report.)</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT>  Written communications pursuant to Rule 425 under the Securities
Act (17 CFR 230.425)</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT>  Soliciting material pursuant to Rule 14a-12 under the Exchange
Act (17 CFR 240.14a-12)</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT>  Pre-commencement communications pursuant to Rule 14d-2(b) under
the Exchange Act (17 CFR 240.14d-2(b))</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Wingdings 2">&#163;</FONT>  Pre-commencement communications pursuant to Rule 13e-4(c) under
the Exchange Act (17 CFR 240.13e-4(c))</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: justify"></P>

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

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>Item 7.01 Regulation FD Disclosure</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">BancFirst Corporation Announces the Merger of 1st Bank Oklahoma
into BancFirst</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">On February 17, 2012, BancFirst
completed the previously announced merger of 1st Bank Oklahoma.</P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">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: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 3.5in">&nbsp;</P>

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

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    <TD STYLE="width: 48%; padding: 0; font-weight: bold; text-decoration: underline; text-indent: 0">BancFirst Corporation</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0 0 0 0.25in; text-indent: 0">(Registrant)</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
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    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">February 17, 2012</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-decoration: underline; text-indent: 0"><U>/s/<B> Joe T. Shockley, Jr. </B></U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Joe T. Shockley, Jr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Executive Vice President and Chief Financial Officer</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">(Principal Financial Officer)</TD></TR>
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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)
February 17, 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 N Broadway, Oklahoma City, OK
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))
Item 7.01 Regulation FD Disclosure
BancFirst Corporation Announces the Merger of 1st Bank Oklahoma
into BancFirst
On February 17, 2012, BancFirst
completed the previously announced merger of 1st Bank Oklahoma.
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)
February 17, 2012
/s/
Joe T. Shockley, Jr.
Joe T. Shockley, Jr.
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)
2