Rockaway Township is a township in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 25,341, an increase of 1,185 (+4.9%) from the 2010 census count of 24,156, which in turn reflected an increase of 1,226 (+5.3%) from the 22,930 counted in the 2000 census.