Barnegat is a census-designated place (CDP) within Barnegat Township, in Ocean County, New Jersey, United States. The population was 1,690 as of the 2000 census. One of the last battles of the American Revolutionary War took place here. Barnegat is located at 39°45′15″N 74°13′16″W / 39.75417°N 74.22111°W / 39.75417; -74.22111 (39.754153, -74.221239).