ZIP code 21904 is officially located in the state of Maryland, primarily serving the city of Bainbridge. It falls under the administrative jurisdiction of Cecil County. When planning mail delivery, logistics routing, or demographic research, 21904 operates within the Eastern Time (ET) timezone and supports the 753 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21904 ZIP Code Tabulation Area is approximately 39,253. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $108,904.