ZIP code 17109 is officially located in the state of Pennsylvania, primarily serving the city of Colonial park. It falls under the administrative jurisdiction of Dauphin County. When planning mail delivery, logistics routing, or demographic research, 17109 operates within the Eastern Time (ET) timezone and supports the 268 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 17109 ZIP Code Tabulation Area is approximately 8,668. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $93,109.