ZIP code 62551 is officially located in the state of Illinois, primarily serving the city of Niantic. It falls under the administrative jurisdiction of Macon County. When planning mail delivery, logistics routing, or demographic research, 62551 operates within the Central Time (CT) timezone and supports the 581 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 62551 ZIP Code Tabulation Area is approximately 15,281. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $107,551.