Jack Cassidy (5 Maart 1927 – 12 Desember 1976) was 'n Amerikaanse akteur. Hy was bekend vir sy rolle in die rolprente The Eiger Sanction (1975), W.C. Fields and Me (1976), en The Private Files of J. Edgar Hoover (1977), en in die televisiereeks He & She (1967).
- 1971: Bunny O'Hare
- 1975: The Eiger Sanction
- 1976: W.C. Fields and Me
- 1977: The Private Files of J. Edgar Hoover
- 1967: He & She
- 1967: Coronet Blue
- 1969: He Said, She Said
- 1969: You're Putting Me On
- 1970: Beat the Clock
- 1972: The Julie Andrews Hour
- 1973: NBC Follies
- 1973: Orson Welles' Great Mysteries
- 1975: Don Adams' Screen Test
- 1962: Mister Magoo's Christmas Carol
- 1969: St. Patrick's Day TV Special
- 1970: The Andersonville Trial
- 1970: George M!
- 1971: The Powder Room
- 1972: Your Money or Your Wife
- 1972: Portable Electric Medicine Show
- 1973: A Time for Love
- 1973: Broadway
- 1973: Of Men and Women
- 1973: A Musical Celebration to Stephen Sondheim
- 1974: The Phantom of Hollywood
- 1974: Fools, Females and Fun
- 1974: McMasters of Sweetwater
- 1975: Knuckle
- 1975: Dean's Place
- 1976: Word Grabbers
