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zipcodes.pro — STATE/MT/COUNTY/CHOUTEAU

Chouteau County, MT ZIP codes

There are 7 ZIP codes in Chouteau County, MT, in 7 towns, from 59420 to 59520. The largest are 59442 (Fort Benton), 59520 (Big Sandy) and 59446 (Geraldine).

The county seat is Fort Benton.

ZIP codes
7
Towns
7
County seat
Fort Benton
County FIPS
30015
State
Montana
Population
5,906
Median household income
$58,218
Land area
3,973 sq mi

Chouteau County ZIP codes by town

Fort Benton (county seat)
59442

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Chouteau County ZIP codes

59420594405944259446594505946059520

The ZIP codes of Chouteau County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Chouteau County in numbers

About 5,906 people live in Chouteau County, in 2,159 households, the 34th most populous of Montana's 56 counties. The median household income is $58,218 a year, 20% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $207,800 (45% below the Montana median), and median gross rent is $536 a month. The median age is 43.0; 23.0% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 19 minutes.

Population5,906Chouteau5,906
Households2,159Chouteau2,159
Median age43.0Chouteau43.0Montana40.4US 38.9
Median household income$58,218Chouteau$58,218Montana$72,509US $80,734
Median home value$207,800Chouteau$207,800Montana$375,800US $332,700
Median gross rent$536Chouteau$536Montana$1,081US $1,413
Bachelor's degree or higher23.0%Chouteau23.0%Montana35.2%US 35.7%
Mean commute18.5 minChouteau18.5 minMontana19.1 minUS 26.4 min
Population density1 / sq miChouteau1 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Chouteau County

Largest towns in Chouteau County
TownZIP codesPopulation
Fort Benton 1 1,474
Big Sandy 1 784
Geraldine 1 317
Highwood 1 205
Loma 1 73
Carter 1 60
Floweree 1 18

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Chouteau County.

Not sure you are in Chouteau County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Chouteau County, with figures

ZIP codes in Chouteau County
ZIP City Type Population Median income Median home
59420 Carter , MT Standard 164 $88,438 $117,100
59440 Floweree , MT Standard 432 — $228,200
59442 Fort Benton , MT Standard 1,838 $67,917 $254,000
59446 Geraldine , MT Standard 629 $53,750 $152,500
59450 Highwood , MT Standard 503 $70,250 $288,200
59460 Loma , MT Standard 178 $51,551 $113,000
59520 Big Sandy , MT Standard 1,261 $62,109 $204,000

Cite this page

zipcodes.pro. “Chouteau County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/chouteau

Underlying data is public domain or openly licensed — sources, vintages and licences.