Gary Lockwood (born John Gary Yusolfsky on February 21, 1937) is an American actor perhaps best known for his iconic 1968 role as the astronaut Dr. Frank Poole in 2001: A Space Odyssey. He is father of the actress Samantha Lockwood. Both currently live in Los Angeles.

Lockwood's birth name was John Gary Yurosek. He was born in Van Nuys in the San Fernando Valley of southern California. He attended the University of California at Los Angeles on a football scholarship.

A familiar face to film and television audiences for nearly a half century, Lockwood was a movie stuntman, and a stand-in for Anthony Perkins prior to his acting debut in 1959 in an uncredited bit role in Warlock.