ZIP code · Mc Allister · Montana · United States

ZIP code 59740 — Mc Allister

ZIP code 59740 serves Mc Allister, Montana.

Postal code
59740
Single source Value from one source, not cross-checked.
City
Mc Allister
County
Madison FIPS 30057
State
Montana
Country
United States
Coordinates
45.4080, -111.7761 — precision estimated (postal-area centroid)
View on OpenStreetMap
Population
467 (ZCTA, ACS 5-year)
Population density
3 / sq mi
Land area
155.8 sq mi (403.5 km²) (ZCTA, ACS 5-year)
Median household income
$46,811
Per-capita income
$27,706
Median age
59.3
Households
238
Housing units
354
Median home value
$629,600
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 (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 83°F), coldest Dec (avg low 15°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F343746556473838272584333
Avg low °F151522283541464437292215
Precip in0.50.50.81.51.92.21.21.01.01.10.70.5

NOAA 1991–2020 climate normals from the nearest station: ENNIS (5.7 mi) · NOAA NCEI

Places in ZIP 59740

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