USS Nyack has been the name of two ships in the United States Navy. The name "Nyack" is taken from Nyack, a village in Rockland County, New York, which derives its name from the Indian word meaning "point" or "corner".
- USS Nyack (1863), a wooden-hulled screw gunboat, served in the Union during the American Civil War.
- USS Nyack (YT-19), was renamed from Tug Sioux to Nyack on 20 February 1918.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.