Twin Rivers (2010 Census population of 7,443) is an unincorporated community and census-designated place (CDP) located within East Windsor Township. According to "New Jersey: A Guide to the State" by Barbara Westergaard, Twin Rivers was "New Jersey's first planned unit development" and "has attracted the scrutiny of countless researchers, from sociologists and anthropologists to specialists in energy conservation." Other unincorporated communities, localities and place names located completely or partially within East Windsor include Allens Station, Eilers Corner, Etra, Hickory Corner, Locust Corner, Millstone and Washington Oak.