ZIP code · Big Timber · Montana · United States

ZIP code 59011 — Big Timber

ZIP code 59011 serves Big Timber, Montana.

Postal code
59011
Single source Value from one source, not cross-checked.
City
Big Timber
County
Sweet Grass FIPS 30097
State
Montana
Country
United States
Coordinates
45.8283, -109.9631 — precision estimated (postal-area centroid)
View on OpenStreetMap
Population
3,131 (ZCTA, ACS 5-year)
Population density
3 / sq mi
Land area
936.4 sq mi (2,425.2 km²) (ZCTA, ACS 5-year)
Median household income
$67,326
Per-capita income
$39,254
Median age
43.5
Households
1,261
Housing units
1,537
Median home value
$286,200
Median gross rent
$1,061 / 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 86°F), coldest Jan (avg low 20°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F384049576776868574594637
Avg low °F202026324048545143342620
Precip in0.70.71.02.23.12.61.41.01.31.50.80.7

NOAA 1991–2020 climate normals from the nearest station: BIG TIMBER (0.6 mi) · NOAA NCEI

Places in ZIP 59011

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