ZIP code 21668 is officially located in the state of Maryland, primarily serving the city of Sudlersville. It falls under the administrative jurisdiction of Queen Annes County. When planning mail delivery, logistics routing, or demographic research, 21668 operates within the Eastern Time (ET) timezone and supports the 516 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 21668 ZIP Code Tabulation Area is approximately 37,616. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $96,668.