Robert Martin Culp (born August 16, 1930) is an American actor and scriptwriter, perhaps best known for his work in television. Culp earned an international reputation for his role as Kelly Robinson on I Spy (1965-1968), the espionage series, where he and co-star Bill Cosby played a pair of secret agents and for playing Ray Barone's father-in-law on Everybody Loves Raymond.

Culp was born in Oakland, California in 1930. He graduated from Berkeley High School. He also attended the University of Washington School of Drama and graduated from the University of the Pacific in Stockton, California. He has been married five times and has three sons and two daughters. From 1967-1970, he was married to Eurasian actress France Nuyen, whom he met when she guest-starred on I Spy in 1966. She appeared in four episodes of the series, two of them written by Culp himself. During the series run, Culp wrote scripts for seven episodes, one of which he also directed. He also wrote scripts for several other television series, including Trackdown.

Culp came to national attention very early in his career as the star of the 1957-59 Western television series Trackdown in which he played Texas Ranger Hoby Gilman. Trackdown was a spin-off of Dick Powell's Zane Grey Theater, also on CBS. Trackdown then had a CBS spin-off of its own: Wanted: Dead or Alive, with Steve McQueen as bounty hunter Josh Randall.