ZIP code 20678 is officially located in the state of Maryland, primarily serving the city of Prince frederick. It falls under the administrative jurisdiction of Calvert County. When planning mail delivery, logistics routing, or demographic research, 20678 operates within the Eastern Time (ET) timezone and supports the 320 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 20678 ZIP Code Tabulation Area is approximately 3,120. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $66,678.