Exhibit 23
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in Registration Statement Nos. 333-162890 and 333-253190 on Form S-8 of our report dated JuneĀ 24, 2021, appearing in the Annual Report on Form 11-K of the ALLETE and Affiliated Companies Retirement Savings and Stock Ownership Plan for the year ended DecemberĀ 31, 2020.
/s/ Reilly, Penner & Benton LLP
Reilly, Penner & Benton LLP
Milwaukee, Wisconsin
July 23, 2021