Frank Connolly Shannon (* 27. Juli 1874 in Irland; † 1. Februar 1959 in Hollywood, Kalifornien) war ein US-amerikanischer Schauspieler. ()
Frank Shannon was an Irish-born stage and screen performer. He had his film debut in The Prisoner of Zenda (1913). He is most fondly remembered as the brilliant Dr. Zarkov in the three Flash Gordon serials.