County Maps US

Cascade County, Montana

A county in Montana, ranked 5 of 56 by population.

CountyFIPS 30013

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

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Population
85,029
+619 (+0.7%) since 2020
Land area
2,698
square miles. A further 0.5% of the total area is water
Population density
31.5
people per square mile, computed rather than published
County seat
Great Falls
Seat of county government.
Established
1887
138 years ago
Largest city
Great Falls city
Population 60,208.

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 Cascade 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 Cascade 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 742 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 Cascade 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
Population85,0295th of 56694th of 3,144
Land area2,698 sq mi21st of 56192nd of 3,144
Population density31.5 per sq mi5th of 561,882nd of 3,144
Median household income$67,69025th of 561,367th of 3,143

Full data for Cascade County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population85,029Vintage 2025 Population Estimates
Population in 202084,410Vintage 2025 Population Estimates
2020 estimates base?84,417Vintage 2025 Population Estimates
Land area2,698 sq mi2025 Gazetteer Files
Water area13.2 sq mi2025 Gazetteer Files
Total area2,711 sq mi2025 Gazetteer Files
Population density?31.5 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$67,690American Community Survey 2020-2024 5-Year Estimates
Median home value$265,300American Community Survey 2020-2024 5-Year Estimates
Median age38.6American Community Survey 2020-2024 5-Year Estimates
Households35,615American Community Survey 2020-2024 5-Year Estimates
Housing units39,497American 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
-71
944 births, 1,015 deaths
Net migration
+433
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 5 areas bordering Cascade 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
Meagher CountyMontana80 mi2,137
Lewis and Clark CountyMontana66 mi75,331
Chouteau CountyMontana65 mi5,865
Judith Basin CountyMontana58 mi2,162
Teton CountyMontana45 mi6,496

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.