ZIP code · Big Arm · Montana · United States
ZIP code 59910 — Big Arm
ZIP code 59910 serves Big Arm, Montana.
- Postal code
- 59910Single source Value from one source, not cross-checked.
- City
- Big Arm
- County
- Lake FIPS 30047
- State
- Montana
- Country
- United States
- Coordinates
- 47.7952, -114.3020 — precision precise (locality)
View on OpenStreetMap - Population
- 605 (ZCTA, ACS 5-year)
- Population density
- 31 / sq mi
- Land area
- 19.3 sq mi (49.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $95,227
- Per-capita income
- $51,564
- Median age
- 41.9
- Households
- 278
- Housing units
- 454
- Median home value
- $606,200
- Congressional district
- MT-1 (119th Congress)
- USDA hardiness zone
- 6a (-10 to -5 °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 59910 with another ZIP · ZIPs within 25 miles · distance from 59910
Map of ZIP code 59910
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 20°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 37 | 47 | 56 | 65 | 71 | 83 | 83 | 71 | 55 | 40 | 32 |
| Avg low °F | 20 | 21 | 26 | 32 | 40 | 46 | 52 | 51 | 43 | 34 | 26 | 21 |
| Precip in | 1.0 | 0.8 | 1.0 | 1.5 | 2.0 | 2.4 | 1.0 | 0.9 | 1.1 | 1.5 | 1.2 | 1.2 |
NOAA 1991–2020 climate normals from the nearest station: SKQ DAM (8.6 mi) · NOAA NCEI
Places in ZIP 59910
- 1 restaurants & cafés
- 3 parks
- 1 post offices
- 1 police & fire stations
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