North Greenbush is a town in Rensselaer County, New York, United States. North Greenbush is located in the western part of the county. The population was 13,292 at the 2020 census. The town has three main hamlets, Wynantskill in the northeastern corner, Defreestville in the southern portion of the town, and Snyder's Lake which occupies the majority of the town's eastern end. Each have strong identities and hinder efforts by the town to have a centralized identity. Also hindering a unified town image is that North Greenbush consists of parts of four different school districts, only one of which (a one-room schoolhouse) carries the town's name; two fire departments (Wynantskill and Defreestville); and three ZIP codes (City of Troy, City of Rensselaer, and Wynantskill). North Greenbush is hom