Exhibit 32.1




                               CERTIFICATION




I, Dan R. Carmichael, President and Chief Executive Officer of Ohio
Casualty Corporation (the "Company"), certify, pursuant to Section 906 of
the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

      1.   The Quarterly Report on Form 10-Q of the Company for the period
      ended June 30, 2007 (the "Report") fully complies with the
      requirements of Section 13(a) of the Securities; Exchange Act of
      1934 (15 U.S.C. 78m); and

      2.   The information contained in the Report fairly presents, in all
      material respects, the financial condition and result of operations
      of the Company.






Dated:  July 30, 2007         /s/Dan R. Carmichael
                              ---------------------------------------------
                              Name:  Dan R. Carmichael
                              Title:  President and Chief Executive Officer




A signed original of this written statement required by Section 906 has
been provided to the Company and will be retained by the Company and
furnished to the Securities and Exchange Commission or its staff upon
request.