Martin Klein

Martin Klein may refer to:


 * Martin Klein (footballer) (born 1984), Czech international footballer
 * Martin Klein (wrestler) (1884–1947), Estonian wrestler
 * Martin Klein (engineer) (born 1941), American engineer and inventor
 * Martin A. Klein, historian of the Atlantic slave trade
 * Martin J. Klein (1924–2009), American science historian
 * R. Martin Klein, American voice actor
 * Marty Klein, art professor