List of ships named Poseidon

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, a Gato-class submarine

In fiction

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