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 (Date of earliest event reported): September 28, 2008

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

(Address of principal executive offices) (Zip Code)

Tel. (415) 765-2969

Registrant’s telephone number, including area code

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):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 8.01. OTHER EVENTS.

On September 28, 2008, UnionBanCal Corporation issued the press release attached to this report as Exhibit 99.1, which is incorporated by this reference.

Item 9.01. Financial Statements and Exhibits.

(d) EXHIBITS.

EXHIBIT NUMBER		DESCRIPTION

99.1		Press Release dated September 28, 2008.

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:	September 29, 2008


		UNIONBANCAL CORPORATION

		By:	/s/ David I. Matson
			David I. Matson
			Vice Chairman & Chief Financial Officer
			(Duly Authorized Officer)

EXHIBIT INDEX

EXHIBIT NUMBER		DESCRIPTION

99.1		Press Release dated September 28, 2008.