Rockaway is a borough in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 6,598, an increase of 160 (+2.5%) from the 2010 census count of 6,438, which in turn reflected a decline of 35 (−0.5%) from the 6,473 counted in the 2000 census.

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.