East Hanover Township is a township in Morris County, New Jersey, United States. As of the 2010 United States Census, the township's population was 11,157, reflecting a decline of 236 (-2.1%) from the 11,393 counted in the 2000 Census, which had in turn increased by 1,467 (+14.8%) from the 9,926 counted in the 1990 Census.