ZIP code 61231 is officially located in the state of Illinois, primarily serving the city of Aledo. It falls under the administrative jurisdiction of Mercer County. When planning mail delivery, logistics routing, or demographic research, 61231 operates within the Central Time (CT) timezone and supports the 225 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 61231 ZIP Code Tabulation Area is approximately 32,425. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,231.