ZIP code 16420 is officially located in the state of Pennsylvania, primarily serving the city of Grand valley. It falls under the administrative jurisdiction of Warren County. When planning mail delivery, logistics routing, or demographic research, 16420 operates within the Eastern Time (ET) timezone and supports the 442 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 16420 ZIP Code Tabulation Area is approximately 37,542. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $80,420.