ZIP code 66944 is officially located in the state of Kansas, primarily serving the city of Haddam. It falls under the administrative jurisdiction of Washington County. When planning mail delivery, logistics routing, or demographic research, 66944 operates within the Central Time (CT) timezone and supports the 760 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 66944 ZIP Code Tabulation Area is approximately 18,960. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $88,944.