New Castle, New York

town in New York, United States

New Castle is a town in Westchester County, New York, United States. The population was 18,311 at the 2020 census.[1]

New Castle has several locations on the National Register of Historic Places, including The Williams-DuBois House, Old Chappaqua Historic District, and Isaac Young House.

According to the United States Census Bureau, the town has a total area of 23.4 square miles (60.7 km2), of which 23.1 square miles (59.8 km2) is land and 0.35 square miles (0.9 km2), or 1.50%, is water.


  1. "QuickFacts: New Castle town, Westchester County, New York". United States Census Bureau. Retrieved March 8, 2024.