Terry Allen may refer to:

• Terry Allen (artist) (born 1943), American country singer and artist
• Terry Allen (big band singer) (1916–1981), American big band singer
• Terry K. Allen, real name of DJ Slip (born 1964), American record producer

• Terry Allen (American football coach) (born 1957), American football coach at Missouri State University
• Terry Allen (basketball) (born 1993), American professional basketball player
• Terry Allen (boxer) (1924–1987), English flyweight boxer
• Terry Allen (running back) (born 1968), American former running back for the Washington Redskins
• Magnum T. A. (born 1959), professional wrestler born Terry Allen

• Terry (Terril) Diener Allen who wrote as T. D. Allen with her husband Don Bala Allen
• Terry de la Mesa Allen Sr. (1888–1969), US Army general in World War II

• Allen (surname)