Rockaway is a borough in Morris County, New Jersey, United States. As of the 2000 United States Census, the borough population was 6,473.
Rockaway was formed as a borough on June 19, 1894, from portions of Rockaway Township, based on the results of a referendum held the previous day.
Rockaway is located at 40°54′01″N 74°30′49″W / 40.900365°N 74.513557°W / 40.900365; -74.513557 (40.900365, -74.513557). The borough has a total area of 2.1 square miles (5.5 km2), of which, 2.1 square miles (5.4 km2) of it is land and 0.04 square miles (0.1 km2) of it (0.95%) is water.