Situated in the Hudson Valley, Westchester County covers an area of 450 square miles (1,200 km2), consisting of 6 cities, 19 towns, and 23 villages. Established in 1683, Westchester was named after the city of Chester, England.[6][7] The county seat is the city of White Plains, while the most populous municipality in the county is the city of Yonkers, with an estimated 200,807 residents in 2016.
Visit the Westchester County Time Machine