ZIP code 15781 is officially located in the state of Pennsylvania, primarily serving the city of Walston. It falls under the administrative jurisdiction of Jefferson County. When planning mail delivery, logistics routing, or demographic research, 15781 operates within the Eastern Time (ET) timezone and supports the 417 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 15781 ZIP Code Tabulation Area is approximately 15,817. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $117,781.