Archville is a hamlet in Mount Pleasant in Westchester County, New York, United States. The hamlet consists of residences, businesses, and a fire station on Union Street, Arch Hill, and Requa Street, all abutting U.S. Route 9. Directly across Route 9 lies Rockwood Hall, part of the Rockefeller State Park Preserve. The volunteer Archville Fire Department serves the hamlet and surrounding area, from the Hudson River to Pocantico Lake and from the edge of Briarcliff Manor to the edge of Sleepy Hollow.