ZIP code 20688 is officially located in the state of Maryland, primarily serving the city of Solomons. It falls under the administrative jurisdiction of Calvert County. When planning mail delivery, logistics routing, or demographic research, 20688 operates within the Eastern Time (ET) timezone and supports the 342 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 20688 ZIP Code Tabulation Area is approximately 23,442. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $136,688.