ZIP code 61739 is officially located in the state of Illinois, primarily serving the city of Fairbury. It falls under the administrative jurisdiction of Livingston County. When planning mail delivery, logistics routing, or demographic research, 61739 operates within the Central Time (CT) timezone and supports the 805 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 61739 ZIP Code Tabulation Area is approximately 5,005. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $103,739.