[Company Letterhead] EXHIBIT 23.1 INDEPENDENT AUDITORS We agree to the incorporation by reference in this Form 8-K of First Bank System, Inc. of our report dated January 31, 1997 appearing in the Annual Report on Form 10-K of U.S. Bancorp for the year ended December 31, 1996. /s/ Deloitte & Touche LLP DELOITTE & TOUCHE LLP Portland, Oregon June 17,1997