ZIP code 99113 is officially located in the state of Washington, primarily serving the city of Colton. It falls under the administrative jurisdiction of Whitman County. When planning mail delivery, logistics routing, or demographic research, 99113 operates within the Pacific Time (PT) timezone and supports the 330 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 99113 ZIP Code Tabulation Area is approximately 22,030. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $61,113.