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<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>UNITED
STATES</B></FONT></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>SECURITIES
AND EXCHANGE COMMISSION</B></FONT></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>Washington,
D.C. 20549</B></FONT></P>

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

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>FORM 8-K</B></FONT></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>Pursuant
to Section 13 or 15(d) of the Securities Exchange Act of 1934</B></FONT></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="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; padding-right: 5.75pt; font-size: 12pt; text-align: center"><FONT STYLE="font-size: 10pt">Date of
    Report (Date of earliest event reported): April 16, 2012</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: windowtext 1pt solid; padding-right: 5.75pt">
        <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 STYLE="padding-right: 5.75pt; font-size: 10pt; text-align: center">(Exact name of registrant as specified in its charter)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 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: 0; font-size: 10pt; text-align: center; text-indent: 0">OKLAHOMA</TD>
    <TD STYLE="width: 34%; border-bottom: windowtext 1pt solid; padding: 0; font-size: 10pt; text-align: center; text-indent: 0">0-14384</TD>
    <TD STYLE="width: 33%; border-bottom: windowtext 1pt solid; padding: 0; font-size: 10pt; text-align: center; text-indent: 0">73-1221379</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">(State or other jurisdiction <BR> of incorporation)</TD>
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">(Commission<BR> File Number)</TD>
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">(I.R.S. Employer<BR> Identification No.)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 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: 67%; border-bottom: windowtext 1pt solid; padding: 0; font-size: 10pt; text-align: center; text-indent: 0">101 North Broadway, Oklahoma City, Oklahoma</TD>
    <TD STYLE="width: 33%; border-bottom: windowtext 1pt solid; padding: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">73102&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">(Address of principal executive offices)</TD>
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">(Zip Code)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 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>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 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: 100%; border-bottom: windowtext 1pt solid; padding: 0; text-indent: 0">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;N/A</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; font-size: 10pt; text-align: center; text-indent: 0">(Former name or former address, if changed since last report.)</TD></TR>
</TABLE>
<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">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: 0pt 0">&nbsp;</P>

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

<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">&nbsp;</P>

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

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<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 First
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 April 16, 2012,
BancFirst Corporation announced its results of operations for the quarter ended March 31, 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>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 85%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; margin-left: 0.5in">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 17%; padding: 0; font-weight: bold; text-align: justify; text-indent: 0">(c)</TD>
    <TD STYLE="width: 83%; padding: 0; font-weight: bold; text-align: justify; text-indent: 0">Exhibits.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; font-weight: bold; text-align: justify; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; font-weight: bold; text-align: justify; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; font-weight: bold; text-decoration: underline; text-align: justify; text-indent: 0">Exhibit No.</TD>
    <TD STYLE="padding: 0; font-weight: bold; text-decoration: underline; text-align: justify; text-indent: 0">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&#9;Press Release, dated April 16,
2012, issued by BancFirst Corporation titled &ldquo;BancFirst Corporation Reports First 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"></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">&nbsp;</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: 0.75in">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">&nbsp;</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</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: 51%; padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="width: 49%; 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 0.36in; text-indent: 0">&nbsp;&nbsp;&nbsp;&nbsp; (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>
<TR STYLE="vertical-align: top">
    <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">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">Date: <U>April 16, 2012</U></TD>
    <TD STYLE="padding: 0; text-indent: 0; border-bottom: Black 1pt solid">/s/<B> Joe T. Shockley, Jr.<U> </U></B></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</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding: 0; text-indent: 0">&nbsp;</TD>
    <TD STYLE="padding: 0; text-indent: 0">Chief Financial Officer</TD></TR>
</TABLE>
<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"></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): April 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
N/A
(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 First
Quarter Earnings
On April 16, 2012,
BancFirst Corporation announced its results of operations for the quarter ended March 31, 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 April 16,
2012, issued by BancFirst Corporation titled "BancFirst Corporation Reports First 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:
April 16, 2012
/s/
Joe T. Shockley, Jr.
Joe T. Shockley, Jr.
Executive Vice President
Chief Financial Officer
2