Exhibit 23 2014 11-K

We consent to the incorporation by reference in the Registration Statement (333-162890) on Form S-8 of ALLETE, Inc. of our report dated June 17, 2015, with respect to the statements of net assets available for benefits of the ALLETE and Affiliated Companies Retirement Savings and Stock Ownership Plan for the years ended December 31, 2014 and 2013, the related statement of changes in net assets available for benefits for the year ended December 31, 2014, and the related supplemental schedule as of December 31, 2014, which report appears in the December 31, 2014, annual report on Form 11-K of the ALLETE and Affiliated Companies Retirement Savings and Stock Ownership Plan.