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


                                 April 27, 2004
                Date of Report (Date of earliest event reported)



                                   NICOR INC.
           (Exact name of registrant as specified in its charter)



          Illinois                   1-7297                    36-2855175
 (State or other jurisdiction      (Commission              (I.R.S. Employer
    of incorporation)               File Number)         Identification Number)



                                1844 Ferry Road
                        Naperville, Illinois 60563-9600
                  (Address of principal executive offices) (Zip Code)


                                (630) 305-9500
                (Registrant's telephone number, including area code)













                                                                        Page 1

Item 5.  Other Events and Regulation FD Disclosure

The following is filed as an exhibit to this report.

Exhibit
Number     Description

 99.1      Press release of Nicor Inc. issued April 27, 2004.











                                                                        Page 2

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 hereunto duly authorized.




                                          Nicor Inc.


Date   April 27, 2004                     /s/ JEFFREY L. METZ
      ------------------------            ------------------------------------

                                          Jeffrey L. Metz
                                          Vice President and Controller










                                                                        Page 3

Exhibit Index

 Exhibit
  Number       Description of Document

   99.1        Press release of Nicor Inc. issued April 27, 2004.