Exhibit 23 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the following Registration Statements and related Prospectuses of First Bank System, Inc. of our report dated January 9, 1996 (except for Note C, as to which the date is February 16, 1996), with respect to the consolidated financial statements of First Bank System, Inc. included in this Annual Report (Form 10-K) for the year ended December 31, 1995. Registration Form Statement No. Purpose - ---- ------------- ------- S-8 2-89224 Capital Accumulation Plan S-8 33-16242 1987 Stock Option Plan S-8 33-42333 Employee Stock Purchase Plan S-8 33-55932 WCIC Options S-8 33-42334 1991 Stock Option Plan S-8 33-52835 1988 Equity Participation Plan S-8 33-52959 1994 Stock Incentive Plan S-8 33-53395 1991 Stock Incentive Plan S-8 333-01099 FirsTier Financial, Inc. Omnibus Equity Plan (as assumed by First Bank System, Inc.) S-3 33-38268 Northern Cities Bancorp acquisition S-3 33-33508 Dividend Reinvestment Plan S-3 33-47785 Siouxland acquisition S-3 33-57169 Metropolitan Financial Corporation warrants S-3 33-55485 First Dakota Financial Corporation acquisition S-3 33-52495 American Bankshares of Mankato acquisition S-3 33-58521 $1 billion shelf registration S-3 33-61667 Warrants for settlement of Edina Realty litigation S-3 33-62251 Southwest Holdings, Inc. acquisition S-4 33-64447 First Interstate Bancorp /s/ Ernst & Young LLP Minneapolis, Minnesota March 1, 1996