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.

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Among Volnukhin's students:

• Anna Golubkina (1889-1890)
• Sergey Konenkov (1892-1896)
• Nikolay Andreyev (1892-1901)
• Alexander Matveyev (1899-1902)
• Natalia Goncharova (1901-1904)
• Stepan Erzia (1902-1906)
• Aleksei Babichev (1907-1912)
• Boris Korolev (circa 1910)
• Isaac Itkind (1912-1913)
• Arkady Plastov (1914-1917)

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.