Robert Phalen (born May 10, 1937) is an American actor who starred in films and on television. He was born in San Francisco, California, where he attended George Washington High School, was active in the school's drama club, and served as student body president.

His early stage work includes his membership in San Francisco's Actor's Workshop, where he played a variety of roles in the early 1960s, including Mick in Harold Pinter's The Caretaker. He was in the 1978 hit horror movie Halloween as Dr. Terence Wynn.