ZIP code 20629 is officially located in the state of Maryland, primarily serving the city of Dowell. It falls under the administrative jurisdiction of Calvert County. When planning mail delivery, logistics routing, or demographic research, 20629 operates within the Eastern Time (ET) timezone and supports the 604 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 20629 ZIP Code Tabulation Area is approximately 35,604. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $133,629.