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.
New Jersey's capital is the city of Trenton, but the governor's official residence has been in Princeton since 1945, when Morven in the borough became the first Governor's mansion. It was later replaced by the larger Drumthwacket, a colonial mansion located in the township. Morven became a museum property of the New Jersey Historical Society.
Princeton was named No. 15 of the top 100 towns in the United States to Live and Work In by Money Magazine in 2005.
Although residents of Princeton (Princetonians) traditionally have a strong community-wide identity, the community had been composed of two separate municipalities: a township and a borough. The central borough was completely surrounded by the township. The Borough seceded from the Township in 1894 in a dispute over school taxes; the two municipalities later formed the Princeton Public Schools, and some other public services were conducted together before they were reunited into a single Princeton in January 2013. The Borough contained Nassau Street, the main commercial street, most of the University campus, and incorporated most of the urban area until the postwar suburbanization. Borough and Township had roughly equal populations.