ZIP code 98858 is officially located in the state of Washington, primarily serving the city of Waterville. It falls under the administrative jurisdiction of Douglas County. When planning mail delivery, logistics routing, or demographic research, 98858 operates within the Pacific Time (PT) timezone and supports the 427 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 98858 ZIP Code Tabulation Area is approximately 17,927. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $126,858.