ZIP code 21703 is officially located in the state of Maryland, primarily serving the city of Zcta 21703. It falls under the administrative jurisdiction of Frederick County. When planning mail delivery, logistics routing, or demographic research, 21703 operates within the Eastern Time (ET) timezone and supports the 646 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21703 ZIP Code Tabulation Area is approximately 23,046. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $91,703.