ZIP code · Eureka · Montana · United States

ZIP code 59917 — Eureka

ZIP code 59917 serves Eureka, Montana.

Postal code
59917
Single source Value from one source, not cross-checked.
City
Eureka
County
Lincoln FIPS 30053
State
Montana
Country
United States
Coordinates
48.8428, -115.0049 — precision precise (locality)
View on OpenStreetMap
Population
5,086 (ZCTA, ACS 5-year)
Population density
21 / sq mi
Land area
245.2 sq mi (635 km²) (ZCTA, ACS 5-year)
Median household income
$61,008
Per-capita income
$31,771
Median age
53
Households
1,957
Housing units
2,462
Median home value
$295,300
Median gross rent
$1,097 / month
Congressional district
MT-1 (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 87°F), coldest Jan (avg low 19°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F323949607077878675574131
Avg low °F192128344249535144352721
Precip in0.90.70.91.01.82.51.11.11.31.21.21.2

NOAA 1991–2020 climate normals from the nearest station: EUREKA RS (4.7 mi) · NOAA NCEI

Places in ZIP 59917

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