ZIP code 17103 is officially located in the state of Pennsylvania, primarily serving the city of Penbrook. It falls under the administrative jurisdiction of Dauphin County. When planning mail delivery, logistics routing, or demographic research, 17103 operates within the Eastern Time (ET) timezone and supports the 317 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 17103 ZIP Code Tabulation Area is approximately 17,117. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $91,103.