Exhibit 99 Contacts: Analyst contact: Dennis E. McDaniel 	 Vice President, Investor Relations 	 513-603-2197 	 dennis.mcdaniel@ocas.com 	 Media contact: Cindy L. Denney 	 Assistant Vice President, Corporate Communications 	 (Ofc.) 513-603-2074 Cell: 513-703-7372 	 cindy.denney@ocas.com For Immediate Release 			 OHIO CASUALTY CORPORATION 		 ANNOUNCES QUARTERLY DIVIDEND FAIRFIELD, Ohio, May 19, 2005 - The Directors of Ohio Casualty Corporation (NASDAQ:OCAS) have declared a regular quarterly dividend of $.06 per share, payable June 10, 2005, to shareholders of record on June 1, 2005. "I am pleased to announce the resumption of a dividend for Ohio Casualty Corporation," commented President and Chief Executive Officer Dan R. Carmichael, CPCU. "This action reflects our positive outlook due to our strong capital position and solid operating performance over the last two years." Corporate Profile Ohio Casualty Corporation is the holding company of The Ohio Casualty Insurance Company, which is one of six property-casualty subsidiary companies that make up Ohio Casualty Group. The Ohio Casualty Insurance Company was founded in 1919 and is licensed in 49 states. Ohio Casualty Group is ranked 48th among U.S. property/casualty insurance groups based on net premiums written (Best's Review, July 2004). The Group's member companies write auto, home and business insurance. Ohio Casualty Corporation trades on the NASDAQ Stock Market under the symbol OCAS and had assets of approximately $5.8 billion as of March 31, 2005. 				 ###