Dilworthtown is an unincorporated community and census-designated place in Chester and Delaware counties, Pennsylvania, United States. It was first listed as a CDP prior to the 2020 census. The CDP is primarily in southeastern Chester County but extends south into western Delaware County. The Chester County part of the community is in Birmingham Township, while the Delaware County part is in Chadds Ford Township. U.S. Route 202 forms the eastern border of the CDP; the highway leads north 4 miles to West Chester and south 11 miles to Wilmington, Delaware.