ZIP code 99348 is officially located in the state of Washington, primarily serving the city of Prescott. It falls under the administrative jurisdiction of Walla Walla County. When planning mail delivery, logistics routing, or demographic research, 99348 operates within the Pacific Time (PT) timezone and supports the 811 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99348 ZIP Code Tabulation Area is approximately 22,511. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $56,348.