ZIP code 99363 is officially located in the state of Washington, primarily serving the city of Wallula. It falls under the administrative jurisdiction of Walla Walla County. When planning mail delivery, logistics routing, or demographic research, 99363 operates within the Pacific Time (PT) timezone and supports the 442 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99363 ZIP Code Tabulation Area is approximately 15,842. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $111,363.