Poseidon has been the name of a number of ships, both real and in fiction.

Real ships

• SS Poseidon was 1968–1969 the name of a steam cargo ship built in 1941 for the British Government and originally named Empire Ballard.
• BN Poseidon was 1951–1959 the name of a coastal tanker launched in 1942 as Empire Faun
• ST Poseidon was 1973–1976 the name of a steam tug built in 1941 for the British Government and originally named Empire Fir.
• HMS Poseidon was a Royal Navy Parthian-class submarine, launched in 1929 and sunk in 1931.
• USS Poseidon (ARL-12) was a United States Navy Achelous-class repair ship, built in 1944 and sold off in 1961.
• Greek submarine Poseidon (S-78), a Gato-class submarine

In fiction

• USS Poseidon, a US Navy attack submarine in the 2005 film Phantom Below.

See also

• Poseidon-class submarine, a Greek submarine class
• Poseidon (disambiguation)

List of ships with the same or similar names

This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.