ZIP code · East Helena · Montana · United States

ZIP code 59635 — East Helena

ZIP code 59635 serves East Helena, Montana.

Postal code
59635
Single source Value from one source, not cross-checked.
City
East Helena
County
Lewis and Clark FIPS 30049
State
Montana
Country
United States
Coordinates
46.5973, -111.9051 — precision precise (locality)
View on OpenStreetMap
Population
8,382 (ZCTA, ACS 5-year)
Population density
105 / sq mi
Land area
79.5 sq mi (206 km²) (ZCTA, ACS 5-year)
Median household income
$73,664
Per-capita income
$36,560
Median age
42.1
Households
3,365
Housing units
3,427
Median home value
$356,200
Median gross rent
$998 / 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 (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 86°F), coldest Jan (avg low 14°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F323748576675868573584333
Avg low °F141725324249555345342314
Precip in0.40.40.51.01.92.21.11.01.00.80.60.5

NOAA 1991–2020 climate normals from the nearest station: HELENA RGNL AP (2.9 mi) · NOAA NCEI

Places in ZIP 59635

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