ZIP code 40021 is officially located in the state of Kentucky, primarily serving the city of Fairfield. It falls under the administrative jurisdiction of Nelson County. When planning mail delivery, logistics routing, or demographic research, 40021 operates within the Central Time (CT) timezone and supports the 401 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 40021 ZIP Code Tabulation Area is approximately Data Not Available. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,021.