East Windsor is a township in Mercer County, in the U.S. state of New Jersey. Located at the cross-roads between the Delaware Valley region to the southwest and the Raritan Valley region to the northeast, the township is an outer-ring suburb of New York City in the New York Metropolitan area, as defined by the United States Census Bureau, but directly borders the Philadelphia metropolitan area and is part of the Federal Communications Commission's Philadelphia Designated Market Area. Since East Windsor is situated at the confluence of several major highways that serve both the major cities of New York City and Philadelphia, and even the local commercial hubs of nearby Freehold, Princeton, and the state capital of Trenton, the community has been a longtime residential, commercial, and industrial hub in the heart of Central New Jersey.As of the 2020 United States census, East Windsor's population was 30,045, its highest decennial count ever and an increase of 2,855 (+10.5%) from the 27,190 recorded at the 2010 census, which in turn reflected an increase of 2,271 (+9.1%) from the 24,919 counted in the 2000 census.Both East Windsor and West Windsor were formed when Windsor Township was split on February 9, 1797, while the area was still part of Middlesex County. It was incorporated by an act of the New Jersey Legislature on February 21, 1798, as one of New Jersey's initial group of 104 townships. Portions of the township were taken to form Hightstown borough (March 5, 1853, within East Windsor; became independent c. 1894) and Washington Township (March 11, 1860, and known as Robbinsville Township since 2007). The township was named for Windsor Township, which was named for Windsor, England.