8-K

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				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) May 4, 2005
							 -----------


			  OHIO CASUALTY CORPORATION
	  (Exact name of registrant as specified in its charter)

	   OHIO                       0-5544                  31-0783294
(State or other jurisdiction       (Commission              (IRS Employer
      of incorporation)            File Number)           Identification No.)

		   9450 Seward Road, Fairfield, Ohio  45014
	     (Address of principal executive offices) (Zip Code)

				(513) 603-2400
	     (Registrant's telephone number, including area code)

			       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):

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

[ ]  Soliciting material pursuant to Rule l4a-12 under the Exchange Act
     (17 CFR 240.14a-12)

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

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


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ITEM 8.01.  Other Events
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(a)  On May 4, 2005, Ohio Casualty Corporation (the "Corporation") issued a
     press release announcing the expiration and results of redemption of
     5.00% Convertible Notes due 2022.  The press release was posted on the
     Corporation's website at http://www.ocas.com and is attached hereto as
     Exhibits 99.1, and hereby incorporated by reference.


ITEM 9.01.  Financial Statements and Exhibits.
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(c)  Exhibits

     Exhibit No.     Description
     ----------      -----------
	99.1         Press release dated May 4, 2005 issued by Ohio Casualty
		     Corporation and posted on the Corporation's website at
		     http://www.ocas.com.





				 SIGNATURE

	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 thereunto duly authorized.





					 OHIO CASUALTY CORPORATION
					 -------------------------
						(Registrant)






May 6, 2005                              /s/Debra K. Crane
					 ---------------------------
					 Debra K. Crane, Senior Vice
					  President, General Counsel
					  and Secretary




				Page 2 of 3




			       Exhibit Index
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			Current Report on Form 8-K
			     Dated May 4, 2005


Exhibit No.    Description
- ----------     -----------

    99.1       Press release dated May 4, 2005 issued by Ohio Casualty
	       Corporation and posted on the Corporation's website at
	       http://www.ocas.com.





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EX-99

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
513-603-2074 (ofc.), 513-703-7372 (cell)
cindy.denney@ocas.com


For Immediate Release
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	     OHIO CASUALTY CORPORATION ANNOUNCES EXPIRATION
    AND RESULTS OF REDEMPTION OF 5.00% CONVERTIBLE NOTES DUE 2022


FAIRFIELD, Ohio, May 4, 2005 - Ohio Casualty Corporation (the "Company")
(NASDAQ: OCAS) today announced the completion of the redemption of its old
5.00% Convertible Notes due 2022 (CUSIP Nos. 677240AB9 and 677240AC7) (the
"Old Notes") and its new 5.00% Convertible Notes due 2022 (CUSIP No.
677240AE3) (the "New Notes", and together with the Old Notes, the "Notes").

Pursuant to the terms of the Indentures between the Company and HSBC Bank USA
dated March 25, 2005 (the "New Indenture") and March 19, 2002 (the "Old
Indenture"), the Company paid $111.7 million in cash towards redemption of the
Notes. The Company expects to deliver approximately 1.3 million common shares
to holders who elected to convert their Old Notes.  On or about June 15, 2005,
the Company also expects to deliver cash and any common shares required by the
net share settlement provision of the New Indenture to holders who elected to
convert $10.6 million in par value of the New Notes.

Separately, the Company repurchased $35.8 million of the Old Notes on April
29, 2005 in unsolicited negotiated transactions prior to the redemption date.






About Ohio Casualty Corporation:

Ohio Casualty Corporation is the holding company of The Ohio Casualty
Insurance Company, which is one of six property-casualty companies that make
up Ohio Casualty Groupr.  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).  Ohio Casualty Corporation trades on the Nasdaq National
Market under the symbol OCAS.


Forward-Looking Statement

The information above includes forward-looking statements within the meaning
of the Securities Act of 1933, as amended and the Securities Act of 1934, as
amended. Such forward-looking statements are subject to certain risks and
uncertainties, as disclosed by Ohio Casualty from time to time in its filings
with the Securities and Exchange Commission.  As a result of these factors,
Ohio Casualty's actual results may differ materially from those indicated or
implied by such forward-looking statements.


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