Heislerville is an unincorporated community and census-designated place (CDP) that is part of Maurice River Township in Cumberland County in the U.S. state of New Jersey. It was named after the Heisler family, prominent members of the Methodist Episcopal Church established here in 1828.

Maurice River Township is the easternmost township in Cumberland County, in the U.S. state of New Jersey. The township, and all of Cumberland County, is part of the Vineland-Bridgeton metropolitan statistical area for statistical purposes, and of the Philadelphia-Wilmington-Camden, PA-NJ-DE-MD combined statistical area, also known as the Delaware Valley or Philadelphia metropolitan area. As of the 2020 United States census, the township's population was 6,218, a decrease of 1,758 (−22.0%) from the 2010 census count of 7,976, which in turn reflected an increase of 1,048 (+15.1%) from the 6,928 counted in the 2000 census.