ZIP code 19731 is officially located in the state of Delaware, primarily serving the city of Port penn. It falls under the administrative jurisdiction of New Castle County. When planning mail delivery, logistics routing, or demographic research, 19731 operates within the Eastern Time (ET) timezone and supports the 448 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 19731 ZIP Code Tabulation Area is approximately 34,048. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,731.