Mikhail Nikolayevich Elgin (Russian: Михаил Николаевич Елгин, romanized: Mikhail Nikolayevich Yelgin, IPA: [mʲɪxɐˈil jɪlˈɡʲin]; born 14 October 1981) is a Russian professional tennis player.

Elgin became famous when he advanced to the quarter–finals in singles at the 2008 St. Petersburg Open, where he lost to Victor Hănescu from Romania 1–6, 4–6.