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) November 18, 2009

ZENITH NATIONAL INSURANCE CORP.

(Exact name of registrant as specified in its charter)

Delaware	1-9627	95-2702776
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)

21255 Califa Street, Woodland Hills, CA		91367-5021
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code (818) 713-1000

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):

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 November 18, 2009, Zenith National Insurance Corp., the Registrant, issued a press release announcing an increase in its California workers’ compensation rates effective January 1, 2010. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and it is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

The following exhibit is filed as part of this report:

Number		Exhibit
99.1		Press Release of Zenith National Insurance Corp. dated November 18, 2009

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

		ZENITH NATIONAL INSURANCE CORP.


Dated:	November 19, 2009	By:	/s/ Michael E. Jansen
			Name:	Michael E. Jansen
			Title:	Executive Vice President and General Counsel

Exhibit Index

Number		Exhibit

99.1		Press Release of Zenith National Insurance Corp. dated November 18, 2009