Robbinsville Township is a township in Mercer County, New Jersey, United States. As of the 2010 United States Census, the township's population was 13,642, reflecting an increase of 3,367 (+32.8%) from the 10,275 counted in the 2000 Census, which had in turn increased by 4,460 (+76.7%) from the 5,815 counted in the 1990 Census. The township is named for George R. Robbins, who lived in the area.