Sicklerville is an unincorporated community and census-designated place (CDP) located within Winslow Township in Camden County, in the U.S. state of New Jersey. As of the 2020 census, Sicklerville had a population of 45,084. It was founded in 1851 by John Sickler, who lived in the area when the present-day town was located within Gloucester Township. The area is served as United States Postal Serv…