ZIP code 40020 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, 40020 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 40020 ZIP Code Tabulation Area is approximately 8,101. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $80,020.