The county is located in the Central Jersey region. Middlesex County holds the nickname, The Greatest County in the Land. Middlesex County hosts an extensive transportation network, including several rail stations along the heavily traveled Northeast Corridor Line of the New Jersey Transit commuter rail system, as well as the intersection of the New Jersey Turnpike and the Garden State Parkway, the state's two busiest motor vehicle roadways, in Woodbridge Township. The center of population of the state of New Jersey is also located within Middlesex County, in East Brunswick, just east of the New Jersey Turnpike. Its county seat 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 is located in the middle of the Northeast megalopolis of the U.S. Many communities within the county serve as commuter towns to and from New York City and other points north. Middlesex is part of the New York metropolitan area. 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.

Middlesex County is located in the north- central part of New Jersey, United States, extending inland from the Raritan Valley region to the northern portion of the Jersey Shore.

Interactive map of Middlesex County, New Jersey

Edison township school district