ZIP code · Boulder · Montana · United States

ZIP code 59632 — Boulder

ZIP code 59632 serves Boulder, Montana.

Postal code
59632
Single source Value from one source, not cross-checked.
City
Boulder
County
Jefferson FIPS 30043
State
Montana
Country
United States
Coordinates
46.2306, -112.1138 — precision precise (locality)
View on OpenStreetMap
Population
2,535 (ZCTA, ACS 5-year)
Population density
6 / sq mi
Land area
444.1 sq mi (1,150.1 km²) (ZCTA, ACS 5-year)
Median household income
$62,770
Per-capita income
$36,777
Median age
43.9
Households
1,012
Housing units
1,099
Median home value
$260,600
Median gross rent
$691 / month
Congressional district
MT-2 (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
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 83°F), coldest Dec (avg low 12°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F353847556472838272574234
Avg low °F121421273543484638281912
Precip in0.30.20.40.81.92.31.41.11.10.60.50.3

NOAA 1991–2020 climate normals from the nearest station: BOULDER (0.1 mi) · NOAA NCEI

Places in ZIP 59632

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