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): July 16, 2002

                              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 July 16, 2002, the Registrant issued a news release announcing its
2002 second quarter earnings. A copy of the news release, including unaudited
financial information released as a part thereof, 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 July 16, 2002 News Release announcing
                            its 2002 second quarter earnings.



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:  July 16, 2002                       By: /s/ Heidi G. Miller
      ----------------                         ------------------------------
                                               Title: Chief Financial Officer

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                                  EXHIBIT INDEX

Exhibit Number             Description of Exhibits

99(a)                      Registrant's July 16, 2002 News Release announcing
                           its 2002 second quarter earnings.

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