ZIP code · Helmville · Montana · United States
ZIP code 59843 — Helmville
ZIP code 59843 serves Helmville, Montana.
- Postal code
- 59843Single source Value from one source, not cross-checked.
- City
- Helmville
- County
- Powell FIPS 30077
- State
- Montana
- Country
- United States
- Coordinates
- 46.8300, -112.9413 — precision estimated (postal-area centroid)
View on OpenStreetMap - Population
- 271 (ZCTA, ACS 5-year)
- Population density
- 1 / sq mi
- Land area
- 425.7 sq mi (1,102.4 km²) (ZCTA, ACS 5-year)
- Median household income
- $79,342
- Per-capita income
- $57,455
- Median age
- 30.7
- Households
- 104
- Housing units
- 201
- Median home value
- $298,200
- Median gross rent
- $631 / month
- Congressional district
- MT-1 (119th Congress)
- USDA hardiness zone
- 5a (-20 to -15 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Denver (UTC−7 / UTC−6 DST)
- Area code
- 406 (from the nearest rate centre)Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 59843 with another ZIP · ZIPs within 25 miles · distance from 59843
Map of ZIP code 59843
Climate — monthly normals
Warmest month Jul (avg high 80°F), coldest Dec (avg low 8°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 32 | 44 | 53 | 63 | 69 | 80 | 80 | 69 | 54 | 38 | 28 |
| Avg low °F | 8 | 9 | 19 | 24 | 32 | 39 | 42 | 40 | 33 | 24 | 16 | 8 |
| Precip in | 0.7 | 0.4 | 0.5 | 0.8 | 1.5 | 2.0 | 0.9 | 0.9 | 1.0 | 1.0 | 1.1 | 0.9 |
NOAA 1991–2020 climate normals from the nearest station: OVANDO 9 SSE (6.5 mi) · NOAA NCEI
Places in ZIP 59843
- 1 schools
- 1 post offices
- 2 places of worship
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page