ZIP code · Garryowen · Montana · United States

ZIP code 59031 — Garryowen

ZIP code 59031 serves Garryowen, Montana.

Postal code
59031
Single source Value from one source, not cross-checked.
City
Garryowen
County
Big Horn FIPS 30003
State
Montana
Country
United States
Coordinates
45.5187, -107.4817 — precision estimated (postal-area centroid)
View on OpenStreetMap
Population
618 (ZCTA, ACS 5-year)
Population density
6 / sq mi
Land area
104.7 sq mi (271.2 km²) (ZCTA, ACS 5-year)
Median household income
$143,750
Per-capita income
$22,429
Median age
17.6
Households
77
Housing units
102
Median home value
$118,800
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 91°F), coldest Jan (avg low 11°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F364153627181919079644838
Avg low °F111523324150565344332213
Precip in0.50.60.91.52.51.91.30.91.41.40.50.5

NOAA 1991–2020 climate normals from the nearest station: HARDIN (16.0 mi) · NOAA NCEI

Places in ZIP 59031

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