Hightstown is a borough in Mercer County, in the U.S. state of New Jersey. Nestled within the Raritan Valley region, Hightstown is an historic, commercial, and cultural hub of Central New Jersey, along with being a diverse outer-ring commuter suburb of New York City in the New York Metropolitan Area. As of the 2020 United States census, the borough's population was 5,900, its highest decennial count ever and an increase of 406 (+7.4%) from the 5,494 recorded at the 2010 census, which in turn reflected an increase of 278 (+5.3%) from the 5,216 counted in the 2000 census.

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.