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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: October 18, 2007


                             UnionBanCal Corporation
             (Exact name of registrant as specified in its charter)


          Delaware                001-15081                   94-1234979
(State of Incorporation)  (Commission File Number)  (IRS Employer Identification
                                                                No.)


                              400 California Street
                          San Francisco, CA 94104-1302
                               Tel. (415) 765-2969


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 18, 2007, the Company issued a press release concerning
earnings for the third quarter of 2007, a copy of which is furnished herewith as
Exhibit 99.1.



Item 9.01  Financial Statements and Exhibits

(c)      Exhibits:



            Exhibit No.                Description
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                 99.1                  Press release dated October 18, 2007.



                                   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 18, 2007


                          UNIONBANCAL CORPORATION


                          By:                     /s/ DAVID I MATSON
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                                                   David I. Matson
                                                 Chief Financial Officer
                                                (Duly Authorized Officer)




                                  EXHIBIT INDEX

           Exhibit No.              Description
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                99.1                Press release dated October 18, 2007.