Grenloch is an unincorporated community and census-designated place (CDP) located within Washington Township, in Gloucester County, in the U.S. state of New Jersey. As of the 2020 census, Grenloch had a population of 863. Grenloch is located along New Jersey Route 168 10.25 miles (16.50 km) south-southeast of Camden. Grenloch has a post office with ZIP Code 08032.