ZIP code 16634 is officially located in the state of Pennsylvania, primarily serving the city of Dudley. It falls under the administrative jurisdiction of Huntingdon County. When planning mail delivery, logistics routing, or demographic research, 16634 operates within the Eastern Time (ET) timezone and supports the 820 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 16634 ZIP Code Tabulation Area is approximately 36,520. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $118,634.