Zip Code 59521 — Box Elder, MT
59521 is a ZIP Code associated with Box Elder, MT, located within Hill. 59521 ranks #2 out of 7 ZIP codes in Hill County by population (and #61 out of 369 in MT). The area supports an estimated population of 3,529 residents across Data Pending housing units, with a population density of 4.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (48.304890, -109.972000)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 59521 |
| Primary City | Box Elder |
| State / Province | MT |
| County | Hill |
| Total Population | 3,529 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 4.8 people/sq mi |
| Timezone | America/Denver |
How 59521 Compares
| Metric | ZIP 59521 | Hill County | MT State Average |
|---|
| Population | 3,529 | 17,162 (Total) | 1,117,606 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 4.8 /sq mi | -- | -- |
| County Pop Rank | #2 of 7 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →