County Maps US

Rosebud County, Montana

A county in Montana, ranked 28 of 56 by population.

CountyFIPS 30087

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

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Population
8,253
-56 (-0.7%) since 2020
Land area
5,008
square miles. A further 0.3% of the total area is water
Population density
1.7
people per square mile, computed rather than published
County seat
Forsyth
Seat of county government.
Established
1901
124 years ago
Largest city
Colstrip city
Population 2,091.

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 Rosebud 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 Rosebud 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 620 by 800 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 Rosebud 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
Population8,25328th of 562,556th of 3,144
Land area5,008 sq mi4th of 5678th of 3,144
Population density1.7 per sq mi38th of 563,015th of 3,144
Median household income$49,91453rd of 562,775th of 3,143

Full data for Rosebud County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population8,253Vintage 2025 Population Estimates
Population in 20208,309Vintage 2025 Population Estimates
2020 estimates base?8,335Vintage 2025 Population Estimates
Land area5,008 sq mi2025 Gazetteer Files
Water area17.1 sq mi2025 Gazetteer Files
Total area5,025 sq mi2025 Gazetteer Files
Population density?1.7 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$49,914American Community Survey 2020-2024 5-Year Estimates
Median home value$182,400American Community Survey 2020-2024 5-Year Estimates
Median age38.0American Community Survey 2020-2024 5-Year Estimates
Households3,070American Community Survey 2020-2024 5-Year Estimates
Housing units3,779American 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
+21
115 births, 94 deaths
Net migration
+13
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 Rosebud 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
Big Horn CountyMontana87 mi12,752
Garfield CountyMontana87 mi1,148
Treasure CountyMontana81 mi728
Custer CountyMontana78 mi12,034
Powder River CountyMontana46 mi1,781
Musselshell CountyMontana31 mi5,582
Petroleum CountyMontana16 mi548
Yellowstone CountyMontana3.0 mi172,692

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.