ZIP code 21810 is officially located in the state of Maryland, primarily serving the city of Allen. It falls under the administrative jurisdiction of Wicomico County. When planning mail delivery, logistics routing, or demographic research, 21810 operates within the Eastern Time (ET) timezone and supports the 325 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21810 ZIP Code Tabulation Area is approximately 10,125. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $110,810.