USS Neptune has been the name of more than one United States Navy ship, and may refer to:
USSClyde(1863), a 294-ton side-wheel steam gunboat, was briefly named Neptune when first commissioned
USSNeptune(1863), a 1,244-ton screw steamship, served during the American Civil War
USSManhattan(1863), a monitor in commission from 1864 to 1877, briefly named USS Neptune during 1869
USSNeptune(AC-8), was a collier that carried the first United States troops to Europe in World War I
USNSNeptune, was a Neptune-class cable repair ship, acquired by the US Navy in 1953 as USS Neptune (ARC-2) and scrapped in 2005
In fiction
A fictitious U.S. Navy nuclear submarine named USS Neptune was the setting of the 1978 movie Gray Lady Down
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.