ZIP code 59521 is officially located in the state of Montana, primarily serving the city of Box elder. It falls under the administrative jurisdiction of Hill County. When planning mail delivery, logistics routing, or demographic research, 59521 operates within the Mountain Time (MT) timezone and supports the 861 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 59521 ZIP Code Tabulation Area is approximately 10,661. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $97,521.