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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 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 26, 2005

                                COLUMBIA BANCORP
             (Exact name of registrant as specified in its chapter)

               Oregon                 0-27938              93-1193156
    (State or other jurisdiction    (Commission           (IRS Employer
          of incorporation)         File Number)       Identification No.)

                        401 East Third Street, Suite 200,
                            The Dalles, Oregon 97058
                    (Address of principal executive offices)

                                 (541) 298-6649
              (Registrant's telephone number, including area code)

                                 Not Applicable
          (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 2.02.  RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On October 26, 2005, Columbia Bancorp (the "Company") announced its financial
results for the third quarter ended September 30, 2005. A copy of the press
release is furnished as Exhibit 99.1 to this report and incorporated by
reference.

ITEM 9.01.  EXHIBITS.

(c) Exhibits

99.1     Press Release dated October 26, 2005.



                                   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.

Dated:  October 26, 2005                /s/ Roger L. Christensen
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                                        Roger L. Christensen, President and
                                        Chief Executive - Columbia River Bank;
                                        President and Chief Executive Officer -
                                        Columbia Bancorp

Dated:  October 26, 2005
                                        /s/ Greg B. Spear
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                                        Greg B. Spear, Executive Vice President,
                                        Chief Financial Officer -
                                        Columbia River Bank; and
                                        Chief Financial Officer -
                                        Columbia Bancorp