County Maps US

Natrona County, Wyoming

A county in Wyoming, ranked 2 of 23 by population.

CountyFIPS 56025

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

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Population
80,526
+227 (+0.3%) since 2020
Land area
5,341
square miles. A further 0.7% of the total area is water
Population density
15.1
people per square mile, computed rather than published
County seat
Casper
Seat of county government.
Established
1888
137 years ago
Largest city
Casper city
Population 58,771.

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 Natrona 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 Natrona 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 800 by 796 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 Natrona 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
Population80,5262nd of 23729th of 3,144
Land area5,341 sq mi5th of 2371st of 3,144
Population density15.1 per sq mi2nd of 232,392nd of 3,144
Median household income$72,15612th of 231,037th of 3,143

Full data for Natrona County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population80,526Vintage 2025 Population Estimates
Population in 202080,299Vintage 2025 Population Estimates
2020 estimates base?79,965Vintage 2025 Population Estimates
Land area5,341 sq mi2025 Gazetteer Files
Water area35.1 sq mi2025 Gazetteer Files
Total area5,376 sq mi2025 Gazetteer Files
Population density?15.1 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$72,156American Community Survey 2020-2024 5-Year Estimates
Median home value$273,000American Community Survey 2020-2024 5-Year Estimates
Median age38.4American Community Survey 2020-2024 5-Year Estimates
Households33,886American Community Survey 2020-2024 5-Year Estimates
Housing units37,309American 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
-25
828 births, 853 deaths
Net migration
+275
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 Natrona 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
Fremont CountyWyoming78 mi39,464
Converse CountyWyoming75 mi13,824
Carbon CountyWyoming74 mi14,013
Johnson CountyWyoming52 mi8,908
Washakie CountyWyoming21 mi7,597

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.