County Maps US

Platte County, Wyoming

A county in Wyoming, ranked 18 of 23 by population.

CountyFIPS 56031

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

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Population
8,634
+2 (0%) since 2020
Land area
2,081
square miles. A further 1.4% of the total area is water
Population density
4.2
people per square mile, computed rather than published
County seat
Wheatland
Seat of county government.
Established
1913
112 years ago
Largest city
Wheatland town
Population 3,516.

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 Platte 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 Platte 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 436 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 Platte 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
Population8,63418th of 232,526th of 3,144
Land area2,081 sq mi22nd of 23273rd of 3,144
Population density4.2 per sq mi12th of 232,814th of 3,144
Median household income$67,71815th of 231,364th of 3,143

Full data for Platte County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population8,634Vintage 2025 Population Estimates
Population in 20208,632Vintage 2025 Population Estimates
2020 estimates base?8,602Vintage 2025 Population Estimates
Land area2,081 sq mi2025 Gazetteer Files
Water area29.4 sq mi2025 Gazetteer Files
Total area2,111 sq mi2025 Gazetteer Files
Population density?4.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$67,718American Community Survey 2020-2024 5-Year Estimates
Median home value$297,900American Community Survey 2020-2024 5-Year Estimates
Median age47.0American Community Survey 2020-2024 5-Year Estimates
Households3,848American Community Survey 2020-2024 5-Year Estimates
Housing units4,688American 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
104 births, 125 deaths
Net migration
+93
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 Platte 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
Goshen CountyWyoming66 mi12,640
Albany CountyWyoming54 mi38,558
Laramie CountyWyoming32 mi102,938
Converse CountyWyoming32 mi13,824
Niobrara CountyWyoming12 mi2,341

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.