ZIP code 62951 is officially located in the state of Illinois, primarily serving the city of Johnston city. It falls under the administrative jurisdiction of Williamson County. When planning mail delivery, logistics routing, or demographic research, 62951 operates within the Central Time (CT) timezone and supports the 801 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 62951 ZIP Code Tabulation Area is approximately 20,401. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $107,951.