ZIP code 64491 is officially located in the state of Missouri, primarily serving the city of Tarkio. It falls under the administrative jurisdiction of Atchison County. When planning mail delivery, logistics routing, or demographic research, 64491 operates within the Central Time (CT) timezone and supports the 509 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 64491 ZIP Code Tabulation Area is approximately 33,409. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $87,491.