INFINITY PROPERTY AND CASUALTY CORPORATION EXHIBIT 23 - CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the following Registration Statement and related prospectus of Infinity Property and Casualty Corporation of our report dated March 18, 2003, with respect to the consolidated financial statements and schedules of Infinity Property and Casualty Corporation included in the Annual Report on Form 10-K for the year ended December 31, 2002. Registration Form Number Description - ----------------------- ------------ -------------------------- S-8 333-103309 Deferred Compensation Plan S-8 333-109445 2002 Stock Option Plan Cincinnati, Ohio /s/ ERNST & YOUNG LLP March 12, 2004