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