ZIP code 21643 is officially located in the state of Maryland, primarily serving the city of Williamsburg. It falls under the administrative jurisdiction of Dorchester County. When planning mail delivery, logistics routing, or demographic research, 21643 operates within the Eastern Time (ET) timezone and supports the 299 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21643 ZIP Code Tabulation Area is approximately 44,399. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $71,643.