ZIP code 17020 is officially located in the state of Pennsylvania, primarily serving the city of Duncannon. It falls under the administrative jurisdiction of Perry County. When planning mail delivery, logistics routing, or demographic research, 17020 operates within the Eastern Time (ET) timezone and supports the 677 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 17020 ZIP Code Tabulation Area is approximately 30,777. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $80,020.