Eugene Klein

Eugene or Gene Klein may refer to:


 * Gene Klein (1921–1990), American entrepreneur and sportsman
 * Gene Klein (soccer) (1952–2023), American soccer coach
 * Eugene Klein (philatelist) (1878–1944), American stamp collector
 * Gene Simmons (born 1949), aka Gene Klein, American rock musician
 * Eugene Klein, American cellist with the Delaware Symphony Orchestra