Mercer County, New Jersey, USA

Mercer County is in central New Jersey along the Delaware River, between the New York and Philadelphia metropolitan areas. Trenton, the county seat and state capital, lies at its southwestern edge, while Princeton is in the north. The county includes urban neighborhoods, suburban communities, university campuses and preserved farmland. Established in 1838, it encompasses the sites of the Revolutionary War battles of Trenton and Princeton. State government and higher education are prominent parts of its economy, with institutions including Princeton University, Rider University and The College of New Jersey.