Exhibit 32  Certifications of Chief Executive Officer and Chief Financial Officer
pursuant to Section 906 of Sarbanes-Oxley Act of 2002
(Furnished but not filed)

In connection with this quarterly
report of Great Northern Iron Ore Properties on Form 10-Q filed with the Securities and
Exchange Commission, I, Joseph S. Micallef, President of the Trustees and Chief Executive
Officer of Great Northern Iron Ore Properties, certify that:

1.       
          This quarterly report fully complies with the requirements of Section 13 or
          15(d) of the Securities Exchange Act of 1934; and

2.       
          The information contained in this quarterly report fairly presents, in all
          material respects, the financial condition and results of operations of Great
          Northern Iron Ore Properties.

A signed original of this written
statement required by Section 906, or other document authenticating, acknowledging or
otherwise adopting the signature that appears in typed form within the electronic version
of this written statement required by Section 906, has been provided to Great Northern
Iron Ore Properties and will be retained by Great Northern Iron Ore Properties and
furnished to the Securities and Exchange Commission or its staff upon request.

|     |                                                                               |  |    |  |                          | 
|---- | ----------------------------------------------------------------------------- |  | -- |  | ------------------------ | 
|Date | July 21, 2005                                                                 |  | By |  | /s/   Joseph S. Micallef | 
|     |                                                                               |  |   
|     | Joseph S. Micallef, President of the Trustees     and Chief Executive Officer | 

In connection with this quarterly
report of Great Northern Iron Ore Properties on Form 10-Q filed with the Securities and
Exchange Commission, I, Thomas A. Janochoski, Vice President & Secretary and Chief
Financial Officer of Great Northern Iron Ore Properties, certify that:

1.       
          This quarterly report fully complies with the requirements of Section 13 or
          15(d) of the Securities Exchange Act of 1934; and

2.       
          The information contained in this quarterly report fairly presents, in all
          material respects, the financial condition and results of operations of Great
          Northern Iron Ore Properties.

A signed original of this written
statement required by Section 906, or other document authenticating, acknowledging or
otherwise adopting the signature that appears in typed form within the electronic version
of this written statement required by Section 906, has been provided to Great Northern
Iron Ore Properties and will be retained by Great Northern Iron Ore Properties and
furnished to the Securities and Exchange Commission or its staff upon request.

|     |                                                                                  |  |    |  |                            | 
|---- | -------------------------------------------------------------------------------- |  | -- |  | -------------------------- | 
|Date | July 21, 2005                                                                    |  | By |  | /s/   Thomas A. Janochoski | 
|     |                                                                                  |  |   
|     | Thomas A. Janochoski, Vice President & Secretary     and Chief Financial Officer | 

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