USS Courser (MSC(O)-6/AMS-6/YMS-201) was a YMS-1-class minesweeper of the YMS-135 subclass built for the United States Navy during World War II.

She was the second ship of the U.S. Navy to be named Courser.

Courser was laid down as YMS-201 on 28 August 1942 by the Hiltebrant Dry Dock Co. of Kingston, New York; launched 19 November 1942; and completed 24 July 1943.

On 17 February 1947, YMS-201 was reclassified as AMS-6, and named Courser the following day.

Courser was struck from the Naval Vessel Register on 1 November 1959.