8-K

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                       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) August 4,2006

                              BANCFIRST CORPORATION
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             (Exact name of registrant as specified in its charter)

            Oklahoma                     0-14384               73-1221379
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  (State or other jurisdiction         (Commission          (I.R.S. Employer
        of incorporation)              File Number)        Identification No.)

            101 N Broadway, Oklahoma City, OK                   73102
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        (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))

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ITEM 8.01 OTHER EVENTS

BancFirst Corporation Announces Acquisition of First Bartlesville Bank

         On August 3rd, 2006 BancFirst Corporation announced that it has
completed the acquisition of First Bartlesville Bank.

Exhibit 99.1 Text of Press Release, dated August 4, 2006 issued by BancFirst
Corporation titled "BancFirst Corporation Announces Acquisition of First
Bartlesville Bank".



                                   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)

August 4, 2006

                                                   /s/ Joseph T. Shockley, Jr.
                                                   -----------------------------
                                                   Joseph T. Shockley, Jr.
                                                   (Principal Financial Officer)

EX-99.1

                                                                    Exhibit 99.1

     BANCFIRST CORPORATION ANNOUNCES ACQUISITION OF FIRST BARTLESVILLE BANK

    OKLAHOMA CITY, Aug. 4 /PRNewswire-FirstCall/ -- BancFirst Corporation
(Nasdaq: BANF) announced that it has completed the acquisition of First
Bartlesville Bank on August 3, 2006. First Bartlesville Bank has approximately
$47 million in assets, $42 million in deposits, and $3.9 million in equity
capital. The acquisition will be accounted for as a purchase. The bank will
operate as First Bartlesville Bank until its systems are merged into the
BancFirst system later this year.

    David Rainbolt, BancFirst Corporation, President and Chief Executive Officer
stated, "Bartlesville is one of Oklahoma's most prominent communities both
historically and in terms of the opportunity it has in front of it, and we are
excited to become a part of it. The caliber of First Bartlesville's staff gives
it a great foundation for growth."

    Glenn Bonner, First Bartlesville Bank, President and Chief Executive Officer
stated, "BancFirst has a community bank culture and philosophy that fits
Bartlesville. With their resources, we can offer our customers a much broader
array of products and services. We also look forward to starting our new
permanent location later this year."

    BancFirst Corporation is an Oklahoma based financial services holding
company. The Company's principal subsidiary bank, BancFirst, is Oklahoma's
largest state-chartered bank with total assets of $3.4 billion, loans of $2.3
billion, deposits of $3.0 billion and equity of $320 million. BancFirst offers
banking services throughout 47 communities across Oklahoma.

    This press release may include forward-looking statements (within the
meaning of the Private Securities Litigation Reform Act of 1995) with respect to
earnings, credit quality, corporate objectives, interest rates and other
financial and business matters. The Company cautions readers that these
forward-looking statements are subject to numerous assumptions, risks and
uncertainties, including economic conditions, the performance of financial
markets and interest rates; legislative and regulatory actions and reforms;
competition; as well as other factors, all of which change over time. Actual
results may differ materially from forward-looking statements.

SOURCE  BancFirst
    -0-                             08/04/2006
    /CONTACT:  David Rainbolt, Chief Executive Officer of BancFirst
Corporation, +1-405-270-1002; or Glenn Bonner, President and Chief Executive
Officer of First Bartlesville Bank, +1-918-338-4390/
    /Photo:  NewsCom:  http://www.newscom.com/cgi-bin/prnh/20040818/BANFLOGO
              PRN Photo Desk photodesk@prnewswire.com /
    (BANF)