ZIP code 61821 is officially located in the state of Illinois, primarily serving the city of Champaign. It falls under the administrative jurisdiction of Champaign County. When planning mail delivery, logistics routing, or demographic research, 61821 operates within the Central Time (CT) timezone and supports the 798 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 61821 ZIP Code Tabulation Area is approximately 30,198. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,821.