Woolwich Township is a township in Gloucester County, New Jersey, United States. As of the 2010 United States Census, the township's population was 10,200, reflecting an increase of 7,168 (+236.4%) from the 3,032 counted in the 2000 Census, which had in turn increased by 1,573 (+107.8%) from the 1,459 counted in the 1990 Census.