ZIP code 18820 is officially located in the state of Pennsylvania, primarily serving the city of Gibson. It falls under the administrative jurisdiction of Susquehanna County. When planning mail delivery, logistics routing, or demographic research, 18820 operates within the Central Time (CT) timezone and supports the 456 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 18820 ZIP Code Tabulation Area is approximately 34,056. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $80,820.