 Kirk DouglasNed Land | Ned Land |
 James MasonCaptain Nemo | Captain Nemo |
 Paul LukasProf. Pierre Arronax | Prof. Pierre Arronax |
 Peter LorreConseil | Conseil |
 Robert J. WilkeFirst Mate of the Nautilus | First Mate of the Nautilus |
 Ted de CorsiaCapt. Farragut | Capt. Farragut |
 Carleton YoungJohn Howard | John Howard |
 J.M. KerriganBilly | Billy |
 Percy HeltonCoach Driver | Coach Driver |
 Gloria PallBlonde Girlfriend (uncredited) | Blonde Girlfriend (uncredited) |
| RRon NymanSailor (uncredited) | Sailor (uncredited) |
 Fred GrahamCasey Moore (uncredited) | Casey Moore (uncredited) |
 Harry HarveyTicket Agent (uncredited) | Ticket Agent (uncredited) |
 Charles GrodinDrummer Boy (uncredited) | Drummer Boy (uncredited) |
 Harper GoffMinister in San Francisco Steam Packet office (uncredited) | Minister in San Francisco Steam Packet office (uncredited) |
 Eddie MarrShipping Agent (uncredited) | Shipping Agent (uncredited) |
 John DaheimNautilus Seaman (uncredited) | Nautilus Seaman (uncredited) |
| JJack StoneyPolice Detective (uncredited) | Police Detective (uncredited) |
 Laurie MitchellOne of Ned's Girlfriends | One of Ned's Girlfriends |
 Jack GarganReporter from The Post (uncredited) | Reporter from The Post (uncredited) |
 Dayton LummisReporter from The Bulletin (uncredited) | Reporter from The Bulletin (uncredited) |
 Jack PennickCannon Mate Carson (uncredited) | Cannon Mate Carson (uncredited) |
 Herb VigranReporter for the Globe (uncredited) | Reporter for the Globe (uncredited) |
