Janos Prohaska (October 10, 1919, Budapest, Hungary – March 13, 1974, Inyo County, California, United States) was a U.S.-based Hungarian actor and stunt performer on American television from the 1960s.

Prohaska also appeared in multiple roles on such TV series as The Outer Limits, Bewitched, I Dream of Jeannie, Lost in Space, and a few episodes of Gilligan's Island, where he plays a gorilla.

He and his son Robert were killed along with 34 others on March 13, 1974, at 8:28 p.m. in the crash of a chartered Sierra Airlines Convair CV-440 aircraft near Bishop, California, while filming the ABC/Wolper Productions television series Primal Man.

During the late 1980s revamp of the DC Comics character Blackhawk by Howard Chaykin, the leader of the eponymous group of World War II fighters was revealed to be named Janos Prohaska, in tribute to the actor.

[citation needed] Ensign Janos, a mugato Starfleet officer in the Star Trek New Frontier novel series was also named for him.