Middlesex County

Middlesex County is a county located in the central portion of the U.S. state of New Jersey, extending inland from the Raritan Valley region to the northern portion of the Jersey Shore. As of the 2020 United States census, the county was the state's third-most populous county with a population of 863,162, its highest decennial count ever and an increase of 53,304 (+6.6%) from the 2010 census count of 809,858, which in turn reflected an increase of 59,696 (8.0%) from the 750,162 counted in the 2000 census. The United States Census Bureau's Population Estimates Program estimated a 2025 population of 883,335, an increase of 20,173 (+2.3%) from the 2020 decennial census. The county seat of Middlesex is the city of New Brunswick, a center for the sciences, arts, and cultural activities, and the headquarters of the state's flagship academic institution, Rutgers University. The county forms part of the New York metropolitan area. Middlesex County calls itself The Greatest County in the Land.