USS SC-636 was a SC-497 class submarine chaser that served in the United States Navy during World War II.

USS SC-661, a fellow SC-497 class submarine chaser.
History
United States
Laid down	29 August 1941
Launched	14 May 1942
Commissioned	11 July 1942
Fate	Foundered off the coast of Okinawa on 9 October 1945.
General characteristics
Displacement	148 tons
Length	110 ft 10 in (34 m)
Beam	17 ft (5 m)
Draft	6 ft 6 in (2 m)
Propulsion	2 × 880bhp General Motors 8-268A diesel engines 1 × Snow and Knobstedt single reduction gear 2 × shafts
Speed	15.6 knots
Complement	28
Armament	1 × 40 mm gun mount 2 × .50 cal (12.7 mm) machine guns 2 × DCP Y guns 2 × DCT

It was laid down on 29 August 1941 by the Vineyard Shipbuilding Co. in Milford, Delaware and launched on 14 May 1942. It was commissioned on 11 July 1942. It foundered during Typhoon Louise on 9 October 1945 off the coast of Okinawa.