HMS Amphion (P439), was an Amphion-class submarine of the Royal Navy, built by Vickers Armstrong and launched 31 August 1944.

[2] Of the class, only Amphion and HMS Astute were completed before the end of the war, and neither were involved in hostilities.

In 1953 she took part in the Fleet Review to celebrate the Coronation of Queen Elizabeth II.

It also contained four electric motors each producing 625 horsepower (466 kW) that drove two shafts.

[4] Amphion was fitted with ten 21 inches (530 mm) torpedo tubes, one QF 4 inch naval gun Mk XXIII, one Oerlikon 20 mm cannon, and a .303 British Vickers machine gun.