Chestertown is a hamlet of the town of Chester, in Warren County, New York, United States.

The population was 586 at the 2010 census, which lists the community as a census-designated place.

[6] The community was founded in 1799 by New Englanders who built mills along its creeks.

[4] Children from Chestertown, along with children from the neighboring communities of Adirondack, Brant Lake and Pottersville, attend North Warren Central School.

Friends and Loon Lakes are surrounded by vacation homes.