Princeton University is a private research university located in Princeton, New Jersey, United States.

It is one of the eight universities of the Ivy League, and one of the nine Colonial Colleges founded before the American Revolution. Princeton provides undergraduate and graduate instruction in the humanities, social sciences, natural sciences and engineering. Princeton does not have schools of medicine, law, divinity, or business, but it does offer professional degrees through the Woodrow Wilson School of Public and International Affairs, the Princeton University School of Engineering and Applied Science and the School of Architecture.

Founded in 1746 in Elizabeth, New Jersey, as the College of New Jersey, the university moved to Newark in 1747, then to Princeton in 1756 and was renamed Princeton University in 1896. The present-day College of New Jersey in nearby Ewing Township, New Jersey, is an unrelated institution. Princeton was the fourth chartered institution of higher education in the American colonies. Princeton had close ties to the Presbyterian Church, but has never been affiliated with any denomination and today imposes no religious requirements on its students.

The university has ties with the Institute for Advanced Study, Princeton Theological Seminary, and the Westminster Choir College of Rider University. Princeton has been associated with 35 Nobel Laureates, 17 National Medal of Science winners, and three National Humanities Medal winners. On a per-student basis, Princeton has the largest university endowment in the world.