Sergei Mikhailovich Volnukhin (1859–1921) was a Russian sculptor, best known for his instruction to a generation of Russian artists at the Moscow School of Painting, Sculpture and Architecture, teaching alongside Prince Paolo Troubetzkoy.
Among Volnukhin's students:
Notable among his own work is the 1909 monument to Ivan Fyodorov in Moscow (with architect Ivan Mashkov.) Volnukhin's papers are held at the Tretyakov Gallery.