According to the United States Census Bureau, the borough had a total area of 1.698 square miles (4.397 km2), including 1.672 square miles (4.329 km2) of land and 0.026 square miles (0.068 km2) of water (1.54%) [REF].
The borough is completely surrounded by Pohatcong Township, making it part of 21 pairs of "doughnut towns" in the state, where one municipality entirely surrounds another [REF].