ZIP code 62511 is officially located in the state of Illinois, primarily serving the city of Atwater. It falls under the administrative jurisdiction of Macoupin County. When planning mail delivery, logistics routing, or demographic research, 62511 operates within the Central Time (CT) timezone and supports the 868 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 62511 ZIP Code Tabulation Area is approximately 27,468. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $127,511.