ZIP code 18921 is officially located in the state of Pennsylvania, primarily serving the city of Erwinna. It falls under the administrative jurisdiction of Bucks County. When planning mail delivery, logistics routing, or demographic research, 18921 operates within the Eastern Time (ET) timezone and supports the 711 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 18921 ZIP Code Tabulation Area is approximately Data Not Available. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,921.