ZIP code 20778 is officially located in the state of Maryland, primarily serving the city of West river. It falls under the administrative jurisdiction of Anne Arundel County. When planning mail delivery, logistics routing, or demographic research, 20778 operates within the Eastern Time (ET) timezone and supports the 687 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 20778 ZIP Code Tabulation Area is approximately 4,887. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $66,778.