ZIP code 61957 is officially located in the state of Illinois, primarily serving the city of Windsor. It falls under the administrative jurisdiction of Shelby County. When planning mail delivery, logistics routing, or demographic research, 61957 operates within the Central Time (CT) timezone and supports the 829 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 61957 ZIP Code Tabulation Area is approximately 13,429. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $109,957.