HMS St. Helena (K590) was a Colony-class frigate of the United Kingdom that served during World War II.

After the British returned her to the United States in 1946, she briefly carried the name USS St. Helena (PF-86).

She was reclassified as a "patrol frigate," PF-86, on 15 April 1943 and laid down by the Walsh-Kaiser Company at Providence, Rhode Island, on 22 September 1943.

Transferred to the United Kingdom under Lend-Lease on 19 February 1944, the ship served in the Royal Navy as HMS St. Helena (K590) until decommissioned in 1945.

Struck from the Naval Vessel Register on 19 June 1946, she was transferred for disposal on 1 April 1947 to the U.S. Maritime Commission, which sold her to the Sun Shipbuilding and Drydock Company of Chester, Pennsylvania, on 1 July 1947 for scrapping.