County Maps US

Chouteau County, Montana

A county in Montana, ranked 34 of 56 by population.

CountyFIPS 30015

Within Montana
Chouteau County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Fort Benton, the county seat, located via the 2025 Census Gazetteer.

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Population
5,865
-46 (-0.8%) since 2020
Land area
3,973
square miles. A further 0.6% of the total area is water
Population density
1.5
people per square mile, computed rather than published
County seat
Fort Benton
Seat of county government.
Established
1865
160 years ago
Largest city
Fort Benton city
Population 1,416.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Chouteau County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Chouteau County, Montana from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 591 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Chouteau County ranks

Position among the 56 counties of Montana, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MontanaNationally
Population5,86534th of 562,741st of 3,144
Land area3,973 sq mi10th of 56123rd of 3,144
Population density1.5 per sq mi41st of 563,027th of 3,144
Median household income$58,21841st of 562,245th of 3,143

Full data for Chouteau County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population5,865Vintage 2025 Population Estimates
Population in 20205,911Vintage 2025 Population Estimates
2020 estimates base?5,911Vintage 2025 Population Estimates
Land area3,973 sq mi2025 Gazetteer Files
Water area24.2 sq mi2025 Gazetteer Files
Total area3,997 sq mi2025 Gazetteer Files
Population density?1.5 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$58,218American Community Survey 2020-2024 5-Year Estimates
Median home value$207,800American Community Survey 2020-2024 5-Year Estimates
Median age43.0American Community Survey 2020-2024 5-Year Estimates
Households2,159American Community Survey 2020-2024 5-Year Estimates
Housing units2,885American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-24
44 births, 68 deaths
Net migration
+37
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 8 areas bordering Chouteau County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Fergus CountyMontana83 mi11,825
Hill CountyMontana75 mi16,167
Cascade CountyMontana65 mi85,029
Liberty CountyMontana36 mi1,957
Blaine CountyMontana28 mi6,860
Judith Basin CountyMontana20 mi2,162
Teton CountyMontana20 mi6,496
Pondera CountyMontana10 mi6,072

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 56 counties of Montana

Open the interactive Montana county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.