- Richard Arlen
- Capt. Robert Lawrence
- Andy Devine
- Slim Collins
- Constance Moore
- Helen Bailey
- Noah Beery
- Captain of the 'Blackhawk'
- Guinn 'Big Boy' Williams
- Blake - the First Mate
- Mala
- Wani - Native Slave Leader
- Thurston Hall
- Sam Bailey
- Betty Amann
- Tania Bailey
- Paul Fix
- Jock - a Sailor
- Richard Lane
- Kit Carson
- Mabel Albertson
- The Widow
- Charles Trowbridge
- Gen. Fremont
- Peter Potter
- Sailor
- Byron Foulger
- Coombs - a Sailor
- Francisco Marán
- Gen. Romero
- Eddy Waller
- Parson
- Mamo Clark
- Mamo
- Budd Buster
- Joe - Settler
- Harry Cording
- Bos'un
- Jim Farley
- Ship's Officer
- Martin Faust
- Helmsman
- Martin Garralaga
- (uncredited)
- Octavio Giraud
- (uncredited)
- Tenen Holtz
- (uncredited)
- Bernard Kikume
- (uncredited)
- Edward LeSaint
- Leader of Protesting Settlers
- Ben Lewis
- Colonel's Orderly
- George Lloyd
- Ship's Officer
- Murdock MacQuarrie
- Bill - a Settler
- James C. Morton
- Ship's Cook
- Charles Murphy
- (uncredited)
- Edwin Stanley
- Chief of Army Intelligence
- Luana Walters
- (uncredited)
