The Eternal Sea is a 1955 American war film directed by John H. Auer and starring Sterling Hayden, Alexis Smith and Ben Cooper. After an American naval officer loses his leg at the Battle of Leyte Gulf, he resists attempts to retire him and continues in the service after learning to cope with his disability. He goes on be promoted to admiral and commands an aircraft carrier during the Korean War.

The film was one of a number of more ambitious productions by Republic Pictures, which had traditionally made low-budget second features. Its release was undermined by the studio's growing financial problems which led to its eventual closure in 1959.