ZIP code 18831 is officially located in the state of Pennsylvania, primarily serving the city of Milan. It falls under the administrative jurisdiction of Bradford County. When planning mail delivery, logistics routing, or demographic research, 18831 operates within the Eastern Time (ET) timezone and supports the 371 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 18831 ZIP Code Tabulation Area is approximately 23,471. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,831.