Eagle of the Sea is based on Charles Tenney Jackson's swashbuckling novel Captain Sazarac.
| Actor | Role |
|---|---|
 Florence VidorLouise Lestron | Louise Lestron |
 Ricardo CortezCaptain Sazarac | Captain Sazarac |
 Sam De GrasseColonel Lestron | Colonel Lestron |
 George BerangerJohn Jarvis | John Jarvis |
 Mitchell LewisCrackley | Crackley |
 Guy OliverBeluche | Beluche |
 George IrvingGeneral Andrew Jackson | General Andrew Jackson |
 James A. MarcusDominique | Dominique |
| EErvin RenardDon Robledo | Don Robledo |
 C.E. AndersonBohon | Bohon |
 Fred DeSilvaNot listed | Not listed |
 Boris KarloffPirate (uncredited) | Pirate (uncredited) |
 Bob KortmanPirate (uncredited) | Pirate (uncredited) |