ZIP code 20657 is officially located in the state of Maryland, primarily serving the city of Lusby. It falls under the administrative jurisdiction of Calvert County. When planning mail delivery, logistics routing, or demographic research, 20657 operates within the Eastern Time (ET) timezone and supports the 272 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 20657 ZIP Code Tabulation Area is approximately 12,872. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $109,657.