ZIP code 18421 is officially located in the state of Pennsylvania, primarily serving the city of Browndale. It falls under the administrative jurisdiction of Susquehanna County. When planning mail delivery, logistics routing, or demographic research, 18421 operates within the Eastern Time (ET) timezone and supports the 756 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 18421 ZIP Code Tabulation Area is approximately 32,956. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,421.