ZIP code · Carter · Montana · United States

ZIP code 59420 — Carter

ZIP code 59420 serves Carter, Montana.

Postal code
59420
Single source Value from one source, not cross-checked.
City
Carter
County
Chouteau FIPS 30015
State
Montana
Country
United States
Coordinates
47.7810, -110.9786 — precision precise (locality)
View on OpenStreetMap
Population
214 (ZCTA, ACS 5-year)
Population density
1 / sq mi
Land area
249 sq mi (644.9 km²) (ZCTA, ACS 5-year)
Median household income
$60,694
Per-capita income
$27,709
Median age
33.5
Households
57
Housing units
73
Median home value
$147,500
Congressional district
MT-2 (119th Congress)
USDA hardiness zone
4a (-30 to -25 °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
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 85°F), coldest Jan (avg low 13°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F333645556573858372564334
Avg low °F131421293846515043322315
Precip in0.50.40.61.62.52.61.21.21.21.10.60.4

NOAA 1991–2020 climate normals from the nearest station: CARTER 14 W (11.2 mi) · NOAA NCEI

Places in ZIP 59420

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