Princeton is a community located in Mercer County, New Jersey, United States. It is best known as the location of Princeton University, which has been sited in the community since 1756. Although Princeton is a "college town", there are other important institutions in the area, including the Institute for Advanced Study.
Princeton University is a dominant feature of the community. Its main campus has its historic center on Nassau Street in the borough and stretches south into the township. Its James Forrestal satellite campus is located in Plainsboro Township, and some playing fields (and half of the University's Lake Carnegie) lie within adjacent West Windsor Township, New Jersey|West Windsor Township.