According to the United States Census Bureau, in 2010 the borough had a total area of 1.819 square miles (4.712 km2), including 1.809 square miles (4.686 km2) of land and 0.010 square miles (0.026 km2) of water (0.56%) [REF].
The borough received its name for its "park-like" setting, on the "high land" of the banks of the Raritan River, overlooking New Brunswick.