ZIP code 74637 is officially located in the state of Oklahoma, primarily serving the city of Fairfax. It falls under the administrative jurisdiction of Osage County. When planning mail delivery, logistics routing, or demographic research, 74637 operates within the Central Time (CT) timezone and supports the 219 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 74637 ZIP Code Tabulation Area is approximately 31,719. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $69,637.