Buster Crabbe
Flash Gordon
Jean Rogers
Dale Arden
Frank Shannon
Dr. Hans Zarkov
Charles Middleton
Ming the Merciless
Priscilla Lawson
Princess Aura
Richard Alexander
Prince Barin
Jack 'Tiny' Lipson
King Vultan
James Pierce
Prince Thun
Theodore Lorch
High Priest
Earl Askam
Officer Torch
Richard Tucker
Professor Gordon
George Cleveland
Professor Hensley
Glenn Strange
Gocko/Robot/Soldier
Lon Poff
First High Priest
Constantine Romanoff
Monkey Man (uncredited)
Duke York
King Kala
Muriel Godspeed
Zona
House Peters Jr.
Shark Man
John Bagni
Hawkman Throne Room Guard
Roy Barcroft
Throne Guard
Carroll Borland
Woman in Ming's Palace
Lynton Brent
Transcontinental Plane Steward
Don Brodie
Radio Scientist
Lane Chandler
Ming's Soldier
Noble 'Kid' Chissell
Guard
Jim Corey
Shark Man
Ray Corrigan
Orangopoid
William Desmond
Hawkman Lookout Captain
Al Ferguson
Spaceograph Operator
Sig Frohlich
Shark Man
Olive Hatch
Aura's Handmaiden
Reed Howes
Pilot
Fred Kohler Jr.
Robot
George Magrill
Ming's Soldier
Charles McMurphy
Atom Furnace Slavedriver
Monte Montague
Ming's Soldier
Bull Montana
Monkey Man
Eddie Parker
Ming's Soldier
Sana Rayya
Priestess of Tigron
Fred Scott
Soldier
Cap Somers
Shark Man
Tom Steele
Plane Passenger
Bunny Waters
Shark Man
Slim Whitaker
Prison Guard
Harry Wilson
Pit Control Operator