Greenville is a bedroom community in New Castle County, Delaware, United States, and a suburb of Wilmington. As of the 2020 census, Greenville had a population of 3,104. For statistical purposes, the United States Census Bureau has defined Greenville as a census-designated place (CDP). The community is also home to the private residence of Joe Biden, the 46th president of the United States, and many Du Pont family descendants.