Westchester County, New York was established in 1683 and named after the city of Chester in England! Its county seat is White Plains, and its fair is held in Yonkers! You might recognize Sleepy Hollow’s Dutch Church, the Tarrytown Light, Croton Aqueduct, Philipsburg Manor, Kykuit, and houses of Washington Irving, Aaron Copland, and Thomas Paine, which are located in this county!