ZIP code 21903 is officially located in the state of Maryland, primarily serving the city of Perryville. It falls under the administrative jurisdiction of Cecil County. When planning mail delivery, logistics routing, or demographic research, 21903 operates within the Eastern Time (ET) timezone and supports the 324 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21903 ZIP Code Tabulation Area is approximately 24,824. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $91,903.