==============================================================================
                                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) October 13, 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))




                                Page 1 of 3
==============================================================================




ITEM 8.01. Other Events
- ---------

(a) On October 13, 2005, Ohio Casualty Corporation (the "Corporation") issued
    a press release announcing the third quarter catastrophe estimate from
    Hurricanes Katrina and Rita.  The press release was posted on the
    Corporation's website at http://www.ocas.com and is attached hereto as
    Exhibits 99, and hereby incorporated by reference.


ITEM 9.01. Financial Statements and Exhibits.
- ---------

(c)  Exhibits


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

          99        Press release dated October 13, 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)






October 13, 2005                        /s/Debra K. Crane
                                        --------------------------------------
                                        Debra K. Crane, Senior Vice President,
                                          General Counsel and Secretary







                               Page 2 of 3





                              Exhibit Index


                       Current Report on Form 8-K
                         Dated October 13, 2005


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

     99        Press release dated October 13, 2005 issued by Ohio Casualty
               Corporation and posted on the Corporation's website at
               http://www.ocas.com.











                               Page 3 of 3