HMS Postillion was a reciprocating engine-powered Algerine-class minesweeper during the Second World War.

The engines produced a total of 2,400 indicated horsepower (1,800 kW) and gave a maximum speed of 16.5 knots (30.6 km/h; 19.0 mph).

They carried a maximum of 660 long tons (671 t) of fuel oil that gave them a range of 5,000 nautical miles (9,300 km; 5,800 mi) at 10 knots (19 km/h; 12 mph).

[1] The ship was put on order for the United States Navy in December 1941 at the Toronto Shipbuilding Company.

[3] After war service she was returned to the USN in December 1946, and was sold to the Greek Navy in 1947 as Machitis.