Robbinsville Township is a township in Mercer County, in the U.S. state of New Jersey. Located at the cross-roads between the Delaware Valley region to the southwest and the Raritan Valley region to the northeast, the township is considered part of the New York Metropolitan area as defined by the United States Census Bureau, but directly borders the Philadelphia metropolitan area and is part of the Federal Communications Commission's Philadelphia Designated Market Area. As of the 2020 United States census, the township's population was 15,476, its highest decennial count ever and an increase of 1,834 (+13.4%) from the 13,642 recorded at the 2010 census, which in turn reflected an increase of 3,367 (+32.8%) from the 10,275 counted in the 2000 census. The township is named for George R. Robbins, who served in the United States House of Representatives from 1855 to 1859 and lived in the area. Inspired by its central geographical location within New Jersey, Robbinsville's motto is Be at the Center of it All.

Mercer County is a county located in the U.S. state of New Jersey. Its county seat is Trenton, also the state capital, prompting its nickname The Capital County. Mercer County alone constitutes the Trenton–Princeton metropolitan statistical area and is considered part of the New York combined statistical area by the U.S. Census Bureau, but also directly borders the Philadelphia metropolitan area and is included within the Federal Communications Commission's Philadelphia Designated Media Market Area. The county is part of the Central Jersey region of the state.