Princeton is a municipality with a
borough form of government in
Mercer County,
New Jersey, United States, that was established in its current form on January 1, 2013, through the consolidation of the
Borough of Princeton and
Princeton Township. As of the
2010 United States Census, the municipality's population was 28,572, reflecting the former township's population of 16,265, along with the 12,307 in the former borough.