Harrietstown is a town in Franklin County, New York, United States. The total population was 5,254 at the 2020 census, In 2010 3,879 of the t…Harrietstown is a town in Franklin County, New York, United States. The total population was 5,254 at the 2020 census, In 2010 3,879 of the town's residents lived in the village of Saranac Lake on the eastern side of the town.