ZIP code 99116 is officially located in the state of Washington, primarily serving the city of Coulee dam. It falls under the administrative jurisdiction of Okanogan County. When planning mail delivery, logistics routing, or demographic research, 99116 operates within the Pacific Time (PT) timezone and supports the 452 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99116 ZIP Code Tabulation Area is approximately 3,952. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $112,116.