Frank Ashmore (born June 17, 1945) is an American actor. He is perhaps best known for his role as the Visitor Fifth Columnist Martin in the 1983 NBC mini series V and its 1984 sequel V: The Final Battle. He reprised his role in the pilot episode of V: The Series but was killed off. He returned later on in V: The Series as Philip, the twin brother of Martin.

Ashmore is known for his film appearances in the 1980 hit comedy film Airplane! and the 1982 sequel Airplane II: The Sequel. He also appeared in the 1979 film Parts: The Clonus Horror and has made guest appearances on some TV shows, including Happy Days, Battlestar Galactica, Touched by an Angel and The West Wing.