ZIP code 59275 is officially located in the state of Montana, primarily serving the city of Westby. It falls under the administrative jurisdiction of Sheridan County. When planning mail delivery, logistics routing, or demographic research, 59275 operates within the Mountain Time (MT) timezone and supports the 706 area codes.
According to the latest US Census Bureau and American Community Survey (ACS) datasets, the total population residing within the 59275 ZIP Code Tabulation Area is approximately 12,606. Understanding local economics is critical for market analysis; the median household income in this postal area sits at $115,275.