Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Stillwater Mining Company and Subsidiaries:

We consent to the incorporation by reference in the registration statements on Form S-3 (Nos. 333-170851, 333-163163) and on Form S-8 (Nos. 333-192424, 333-182012, 333-159144, 333-156262, 333-129953, 333-117927, 333-111989, 333-76314, 333-66364, and 333-70861) of Stillwater Mining Company of our reports dated March 3, 2014, with respect to the consolidated balance sheets of Stillwater Mining Company as of December 31, 2013 and 2012, and the related consolidated statements of comprehensive (loss) income, changes in equity, and cash flows for each of the years in the three-year period ended December 31, 2013, and the effectiveness of internal control over financial reporting as of December 31, 2013, which reports appear in the December 31, 2013 annual report on Form 10-K of Stillwater Mining Company.

/s/ KPMG LLP

Billings, Montana

March 3, 2014