Exhibit 23 INDEPENDENT ACCOUNTANTS' CONSENT The Board of Directors Commerce Bancshares, Inc.: We consent to incorporation by reference in Registration Statements No. 33- 28294, No. 33-82692, No. 33-8075, No. 33-78344, No. 33-61499, No. 33-61501 and No. 333-14651, each on Form S-8 of Commerce Bancshares, Inc. of our report dated January 31, 2000, relating to the consolidated balance sheets of Commerce Bancshares, Inc. and Subsidiaries as of December 31, 1999 and 1998 and the related statements of income, stockholders' equity and cash flows for each of the years in the three-year period ended December 31, 1999, which report appears in the December 31, 1999 annual report on Form 10-K of Commerce Bancshares, Inc. KPMG LLP Kansas City, Missouri March 10, 2000