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 | April 25, 2006                                                                |  | 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 | April 25, 2006                                                                   |  | By |  | /s/   Thomas A. Janochoski | 
|     |                                                                                  |  |   
|     | Thomas A. Janochoski, Vice President &     Secretary and Chief Financial Officer | 

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