Poseidon has been the name of a number of ships, both real and in fiction.
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 tugboat built in 1941 for the British Government and originally named Empire Fir. was a Royal Navy , launched in 1929 and sunk in 1931. was a United States Navy , built in 1944 and sold off in 1961. , a KBV 001 Poseidon (IMO 9380441), a Swedish Coast Guard vessel
In fiction SS Poseidon, the namesake ship in the novel The Poseidon Adventure and its adaptations
See also , a Greek submarine class Poseidon (disambiguation)