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. United States Postal Zip Codes for Princeton include 08542 (largely the Borough), 08544 (the University), 08543 (the Seminary), and 08540. The latter covers areas outside Princeton proper, including portions of Lawrence , Hopewell, and West Windsor Townships in Mercer County, Montgomery and Franklin Townships in Somerset County, and Plainsbory and South Brunswick Townships in Middlesex County.
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