ZIP code 61820 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, 61820 operates within the Central Time (CT) timezone and supports the 742 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 61820 ZIP Code Tabulation Area is approximately 33,642. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $80,820.