Winslow Township is a township in Camden County, New Jersey, United States. As of the 2010 United States Census, the township's population was 39,499, reflecting an increase of 4,888 (+14.1%) from the 34,611 counted in the 2000 Census, which had in turn increased by 4,524 (+15.0%) from the 30,087 counted in the 1990 Census.