ZIP code 83605 is officially located in the state of Idaho, primarily serving the city of Caldwell. It falls under the administrative jurisdiction of Canyon County. When planning mail delivery, logistics routing, or demographic research, 83605 operates within the Pacific Time (PT) timezone and supports the 278 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 83605 ZIP Code Tabulation Area is approximately 37,378. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $125,605.