Nelsonville is a village located in Putnam County, in the state of New York (NY), United States. Nestled in the Middle Atlantic division of the North-east region, it covers an area of 1.0 square miles (3.0 km²) and sits at an elevation of 198 ft. With a population of approximately 565 residents, Nelsonville offers a peaceful, rural atmosphere.
The town's population is composed of about 50.62% males and 49.38% females, and it has a population density of 543.27 people per square mile (209.76/km²). Nelsonville lies at a latitude of 41.42 and a longitude of -73.94, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (5.3%), followed by English (8.5%), German (11.2%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 10516.