ZIP code · Mosby · Montana · United States

ZIP code 59058 — Mosby

ZIP code 59058 serves Mosby, Montana.

Postal code
59058
Single source Value from one source, not cross-checked.
City
Mosby
County
Garfield FIPS 30033
State
Montana
Country
United States
Coordinates
46.9005, -107.7891 — precision precise (locality)
View on OpenStreetMap
Population
45 (ZCTA, ACS 5-year)
Population density
0 / sq mi
Land area
618.8 sq mi (1,602.7 km²) (ZCTA, ACS 5-year)
Per-capita income
$30,309
Median age
54.8
Households
17
Housing units
28
Median home value
$243,800
Congressional district
MT-2 (119th Congress)
USDA hardiness zone
4b (-25 to -20 °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.

Climate — monthly normals

Warmest month Jul (avg high 88°F), coldest Jan (avg low 14°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F343849596878888776604637
Avg low °F141726354453605848372517
Precip in0.40.40.61.32.62.91.91.21.21.20.50.4

NOAA 1991–2020 climate normals from the nearest station: MOSBY 4 ENE (8.5 mi) · NOAA NCEI

Places in ZIP 59058

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