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 1, 2001

                              BANK ONE CORPORATION
             (Exact name of registrant as specified in its charter)


          Delaware                     001-15323                31-0738296
(State or other jurisdiction   (Commission File Number)       (IRS Employer
     of incorporation)                                     Identification No.)

       1 Bank One Plaza, Chicago, IL                       60670
  (Address of principal executive offices)                (Zip Code)


       Registrant's telephone number, including area code:   312-732-4000



Item 5.  Other Events and Regulation FD Disclosure
------

     On October 1, 2001, the Registrant issued a press release announcing the
redemption of two series of the Registrant's preferred stock. A copy of the
press release is attached as Exhibit 99(a) to this Current Report on Form 8-K
and incorporated by reference herein.

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits
------

(c)  Exhibits.

     Exhibit Number    Description of Exhibits
     --------------    -----------------------

     99(a)             Registrant's October 1, 2001 press release announcing the
                       redemption of two series of the Registrant's preferred
                       stock.


SIGNATURES

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 hereunto duly authorized.



                                     BANK ONE CORPORATION
                                         (Registrant)


Date: October 2, 2001                By: /s/ Michael Cavanagh
                                         ----------------------
                                     Title: Treasurer


                                      -2-


                                 EXHIBIT INDEX



Exhibit Number    Description of Exhibits
--------------    -----------------------


99(a)             Registrant's October 1, 2001 press release announcing the
                  redemption of two series of the Registrant's preferred stock.

                                      -3-