Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form  S-8 of our report dated February 16, 2007 relating to the consolidated financial statements, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appears in the 2006 Annual Report to Stockholders, which is incorporated by reference in Zenith National Insurance Corp.’s Annual Report on Form 10-K for the year ended December 31, 2006. We also consent to the incorporation by reference of our report dated February 16, 2007 relating to the financial statement schedules, which appears in such Annual Report on Form 10-K.

PricewaterhouseCoopers LLP

Los Angeles, California

June 5, 2007