ZIP code 21001 is officially located in the state of Maryland, primarily serving the city of Aberdeen. It falls under the administrative jurisdiction of Harford County. When planning mail delivery, logistics routing, or demographic research, 21001 operates within the Eastern Time (ET) timezone and supports the 232 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21001 ZIP Code Tabulation Area is approximately 35,932. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $57,001.