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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) April 26, 2006

                                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 April 26, 2006, Columbia Bancorp (the "Company") announced its financial
results for the first quarter ended March 31, 2006. A copy of the press release
is furnished as Exhibit 99.1 to this report and incorporated by reference. Item

ITEM 9.01.  EXHIBITS.

(d) Exhibits

99.1   Press Release dated April 26, 2006.



                                   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.

                                      /s/ Roger L. Christensen
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Dated:  April 26, 2006                Roger L. Christensen,
                                      President and Chief Executive -
                                      Columbia River Bank; President and
                                      Chief Executive Officer - Columbia Bancorp

                                      /s/ Greg B. Spear
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Dated: April 26, 2006                 Greg B. Spear,
                                      Executive Vice President,
                                      Chief Financial Officer -
                                      Columbia River Bank; and
                                      Chief Financial Officer - Columbia Bancorp