ZIP code 42431 is officially located in the state of Kentucky, primarily serving the city of Madisonville. It falls under the administrative jurisdiction of Hopkins County. When planning mail delivery, logistics routing, or demographic research, 42431 operates within the Central Time (CT) timezone and supports the 258 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 42431 ZIP Code Tabulation Area is approximately 5,158. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $67,431.