Glasco is a hamlet (and census-designated place) in Ulster County, New York, United States. The population was 1,692 at the 2000 census.
Glasco is a community in the Town of Saugerties east of U.S. Route 9W. The community is north of Kingston, New York.
Glasco is located at 42°2′51″N 73°57′10″W / 42.0475°N 73.95278°W / 42.0475; -73.95278 (42.047539, -73.952860).