| Person | Type | Job | Role(s) |
|---|---|---|---|
 Ben Roberts | Crew | Writing | Screenplay |
 C. S. Forester | Crew | Writing | Novel, Adaptation |
Cliff Richardson | Crew | Crew | Special Effects |
George Blackwell | Crew | Crew | Special Effects |
 Guy Green | Crew | Camera | Director of Photography |
Harold V. King | Crew | Sound | Sound |
Harry Barndollar | Crew | Crew | Special Effects |
Ivan Goff | Crew | Writing | Screenplay |
Jack Harris | Crew | Editing | Editor |
Louis Levy | Crew | Sound | Music Director |
 Raoul Walsh | Crew | Directing | Director |
Robert Farnon | Crew | Sound | Music |
Tony Sforzini | Crew | Costume & Make-Up | Makeup Artist |
Æneas MacKenzie | Crew | Writing | Screenplay |
Thomas N. Morahan | Crew | Art | Art Direction, Costume Design |
Sheila Graham | Crew | Costume & Make-Up | Costume Design |
Arthur Rhoades | Crew | Crew | Special Effects |
 Alan Tilvern | Cast | Actor | Hernandez |
 Alec Mango | Cast | Actor | El Supremo (Don Julian Alvarado) |
 Alexander Davion | Cast | Actor | Spanish Officer (uncredited) |
 Amy Veness | Cast | Actress | Mrs. McPhee (Hornblower's Housekeeper) |
 Anthony Forwood | Cast | Actor | Lt. Woodford (uncredited) |
Arthur Gomez | Cast | Actor | French Corvette Captain (uncredited) |
Basil Bartlett | Cast | Capt. Elliott (uncredited) | |
 Christopher Lee | Cast | Actor | Spanish Captain |
David Birks | Cast | Crewman (uncredited) | |
 Denis O'Dea | Cast | Actor | RAdm. Sir Rodney Leighton |
 Gregory Peck | Cast | Actor | Capt. Horatio Hornblower R.N |
 Ingeborg von Kusserow | Cast | Actress | Hebe (Lady Barbara's Maid) |
 James Kenney | Cast | Actor | Midshipman Longley |
 James Robertson Justice | Cast | Actor | Seaman Quist |
John Witty | Cast | Actor | Capt. Entenza |
 Kynaston Reeves | Cast | Actor | Adm. Lord Hood |
Michael Dolan | Cast | Surgeon Gundarson | |
 Michael Goodliffe | Cast | Actor | Col. Caillard - POW Escort |
 Moultrie Kelsall | Cast | Actor | Lt. Crystal |
 Patric Doonan | Cast | Actor | Seaman (uncredited) |
 Richard Hearne | Cast | Actor | Polwheal (Hornblower's Batman) |
 Richard Johnson | Cast | Actor | Macrae (uncredited) |
 Robert Beatty | Cast | Actor | Lt. William Bush |
 Robert Cawdron | Cast | Actor | "Witch of Endor" French Mate (uncredited) |
 Ronald Adam | Cast | Actor | Adm. McCartney |
 Stanley Baker | Cast | Actor | Mr. Harrison (Bosun) |
 Terence Morgan | Cast | Actor | 2nd Lt. Gerard |
 Virginia Mayo | Cast | Actress | Lady Barbara Wellesley |
 Diane Cilento | Cast | Actress | Maria Hornblower (voice) (uncredited) |
 Eugene Deckers | Cast | Actor | French Commandant |
Howard Connell | Cast | Actor | "Lydia" Seaman (uncredited) |
Lindsay Hooper | Cast | Crewman (uncredited) | |
Chris Adcock | Cast | Crewman (uncredited) | |
André Belhomme | Cast | Actor | French Guard (uncredited) |
Steve Donahue | Cast | Crewman (uncredited) | |
| Person | Type | Job | Role(s) |
