ZIP code 66429 is officially located in the state of Kansas, primarily serving the city of Grantville. It falls under the administrative jurisdiction of Jefferson County. When planning mail delivery, logistics routing, or demographic research, 66429 operates within the Central Time (CT) timezone and supports the 568 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 66429 ZIP Code Tabulation Area is approximately 6,168. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $133,429.