Situated in the Hudson Valley, Westchester covers an area of 450 square miles (1,200 km2), consisting of 48 municipalities. Established in 1683, Westchester was named after the city of Chester, England. The county seat is the city of White Plains.
Westchester County is one of the centrally located counties within the New York metropolitan area. The county is positioned with New York City, Nassau and Suffolk counties on Long Island, and Long Island Sound to its south; Putnam County to its north; Fairfield County, Connecticut to its east; and Rockland County and Bergen County, New Jersey across the Hudson River to the west. Westchester was the first suburban area of its scale in the world to develop, due mostly to the upper middle-class development of entire communities in the late 19th century and the subsequent rapid population growth.
The headquarters of MasterCard and PepsiCo are situated in Westchester County, in the hamlet of Purchase. Tech Valley is a marketing name for the eastern part of New York State, including the Hudson Valley and the Capital District. The term originated in 1998 to promote the greater Albany area as a competitor to regions such as Silicon Valley and Boston, it has since grown to represent the counties in New York between IBM’s Westchester County plants in the south and the Canadian border to the north. Westchester County has also developed a burgeoning biotechnology sector in the 21st century, with over US$1 billion in planned private investment as of 2016, earning the county the nickname Biochester.
Westchester County has 6 cities, 19 towns, and 23 villages. A town may have from zero to multiple villages. As well, a village can be located in more than one town, as two of Westchester’s villages are. The largest city in the county by population is Yonkers with nearly 200,000 residents. The city with the highest population density is Mount Vernon with a density of 15,564 individuals per square mile.
Cities in Westchester have many well established sub-areas within the municipal boundaries. Many of these are similar to hamlets and date back to as early as the late 1600s such as Cooper’s Corners in New Rochelle. These areas also include some of the first planned communities in the country such as New Rochelle’s Residence Park, Rochelle Park and Heights and Sutton Manor.
Content courtesy of Wikipedia.org