ZIP code 17777 is officially located in the state of Pennsylvania, primarily serving the city of Watsontown. It falls under the administrative jurisdiction of Northumberland County. When planning mail delivery, logistics routing, or demographic research, 17777 operates within the Eastern Time (ET) timezone and supports the 379 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 17777 ZIP Code Tabulation Area is approximately 21,379. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $49,777.