County Maps US

Campbell County, Wyoming

A county in Wyoming, ranked 3 of 23 by population.

CountyFIPS 56005

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

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Population
48,145
+999 (+2.1%) since 2020
Land area
4,802
square miles. A further 0.1% of the total area is water
Population density
10.0
people per square mile, computed rather than published
County seat
Gillette
Seat of county government.
Established
1911
114 years ago
Largest city
Gillette city
Population 34,024.

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 Campbell 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 Campbell County, Wyoming 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 409 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 Campbell County ranks

Position among the 23 counties of Wyoming, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn WyomingNationally
Population48,1453rd of 231,036th of 3,144
Land area4,802 sq mi7th of 2387th of 3,144
Population density10.0 per sq mi4th of 232,565th of 3,144
Median household income$89,8692nd of 23302nd of 3,143

Full data for Campbell County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population48,145Vintage 2025 Population Estimates
Population in 202047,146Vintage 2025 Population Estimates
2020 estimates base?47,028Vintage 2025 Population Estimates
Land area4,802 sq mi2025 Gazetteer Files
Water area4.3 sq mi2025 Gazetteer Files
Total area4,806 sq mi2025 Gazetteer Files
Population density?10.0 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$89,869American Community Survey 2020-2024 5-Year Estimates
Median home value$279,100American Community Survey 2020-2024 5-Year Estimates
Median age36.3American Community Survey 2020-2024 5-Year Estimates
Households17,988American Community Survey 2020-2024 5-Year Estimates
Housing units20,023American 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
+274
602 births, 328 deaths
Net migration
-223
More people moved out than moved in.

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

The 6 areas bordering Campbell 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
Johnson CountyWyoming75 mi8,908
Crook CountyWyoming58 mi7,852
Converse CountyWyoming47 mi13,824
Weston CountyWyoming47 mi6,840
Powder River CountyMontana47 mi1,781
Sheridan CountyWyoming30 mi33,241

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

All 23 counties of Wyoming

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

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