About This Place
Port Monmouth is a census-designated place and unincorporated area located within Middletown Township, in Monmouth County, New Jersey. As of the 2010 United States Census, the CDP population was 3,818.
Port Monmouth is located at 40°26′05″N 74°06′05″W / 40.434607°N 74.101446°W / 40.434607; -74.101446 (40.434607, -74.101446).
According to the United States Census Bureau, the CDP has a total area of 1.3 square miles (3.4 km2), of which 0.04 square miles (0.10 km2), or 1.49%, is water.