SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                      -------------------------------------

                                   FORM 10-Q-A

[X]      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934
         For the quarterly period ended March 31, 2005

                                       OR

[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934
         For the transition period from __________ to __________


                         Commission File Number: 0-23064


                             SOUTHWEST BANCORP, INC.
             (Exact name of registrant as specified in its charter)


Oklahoma                                                      73-1136584
(State or other jurisdiction of                               (I.R.S. Employer
incorporation or organization)                                Identification
                                                              Number)


608 South Main Street                                         74074
Stillwater, Oklahoma                                          (Zip Code)
(Address of principal executive office)

Registrant's telephone number, including area code:  (405) 372-2230

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding twelve months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past ninety days.

                                 [X] YES [ ] NO

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Exchange Act).

                                 [X] YES [ ] NO

APPLICABLE ONLY TO CORPORATE ISSUERS: Indicate the number of shares outstanding
of each of the issuer's classes of common stock, as of the latest practicable
date.

                           12,195,001 (as of 05-02-05)
                           ----------

This amendment is filed solely to provide certificates pursuant to Rule
13-a-14(a) to replace the original certificates inadvertently filed on a
superseded form which omitted certain prefatory language from paragraph 4
required by the current form and included paragraph 6, which is no longer
required by the form.


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