ZIP code 59821 is officially located in the state of Montana, primarily serving the city of Arlee. It falls under the administrative jurisdiction of Lake County. When planning mail delivery, logistics routing, or demographic research, 59821 operates within the Mountain Time (MT) timezone and supports the 232 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 59821 ZIP Code Tabulation Area is approximately 32,432. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,821.