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: January 19, 2006


                             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))





Item 2.02 Results of Operations and Financial Condition.

     On January 19, 2006, the Company issued a press release concerning earnings
for the fourth quarter of 2005, a copy of which is furnished herewith as Exhibit
99.1.


Item 9.01  Financial Statements and Exhibits

     (c)  Exhibits:



   Exhibit No.              Description
--------------------------------------------------------------------------------
        99.1             Press release dated January 19, 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.


Dated:   January 19, 2006


                                  UNIONBANCAL CORPORATION

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





                                  EXHIBIT INDEX

   Exhibit No.              Description
--------------------------------------------------------------------------------
        99.1             Press release dated January 19, 2006.