Keeseville is a hamlet (and census-designated place) in Clinton and Essex counties, New York, in the United States. The population was 1,815 at the 2010 census. The hamlet was named after the Keese family, early settlers from Vermont. It developed along the Ausable River, which provided water power for mills and industrial development.
Keeseville is located at 44°30′13″N 73°28′52″W / 44.50361°N 73.48111°W / 44.50361; -73.48111 (44.503688, -73.481087), south of Plattsburgh, just west of Lake Champlain, within the Adirondack Park. The Ausable River, forming the boundary between Clinton and Essex counties, flows through the village. The north half of the hamlet is within the Town of Au Sable in Clinton County, while the southern half is in the Town of Chesterfield in Essex County.
According to the United States Census Bureau, the village has a total area of 1.2 square miles (3.2 km), of which 1.2 square miles (3.0 km) is land and 0.04 square miles (0.1 km), or 4.47%, is water.
Keeseville is at the junction of US Route 9, New York State Route 22 and New York State Route 9N, as well as Essex County Roads 15, 16, and 17. Interstate 87, the Northway, passes west of the village, with access from Exit 34 (NY 9N).
As of the census of 2000, there were 1,850 people, 706 households, and 477 families residing in the hamlet. The population density was 1,584.4 people per square mile (610.5/km²). There were 816 housing units at an average density of 698.8 per square mile (269.3/km²). The racial makeup of the hamlet was 96.54% White, 0.92% African American, 0.38% Native American, 0.32% Asian, 0.70% from other races, and 1.14% from two or more races. Hispanic or Latino of any race were 1.35% of the population.
There were 706 households out of which 34.4% had children under the age of 18 living with them, 48.7% were married couples living together, 13.6% had a female householder with no husband present, and 32.4% were non-families. 24.9% of all households were made up of individuals and 11.0% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.04.
In the hamlet the population was spread out with 27.1% under the age of 18, 8.5% from 18 to 24, 29.2% from 25 to 44, 22.4% from 45 to 64, and 12.8% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 94.7 males. For every 100 females age 18 and over, there were 90.9 males.
The median income for a household in the hamlet was $32,813, and the median income for a family was $36,181. Males had a median income of $28,229 versus $21,500 for females. The per capita income for the hamlet was $13,939. About 10.9% of families and 15.3% of the population were below the poverty line, including 21.5% of those under age 18 and 9.9% of those age 65 or over.