County Maps US

Adair County, Oklahoma

A county in Oklahoma, ranked 40 of 77 by population.

CountyFIPS 40001

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

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Population
19,828
+379 (+1.9%) since 2020
Land area
573.9
square miles. A further 0.6% of the total area is water
Population density
34.6
people per square mile, computed rather than published
County seat
Stilwell
Seat of county government.
Established
1907
118 years ago
Largest city
Stilwell city
Population 3,892.

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 Adair 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 Adair County, Oklahoma 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 456 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 Adair County ranks

Position among the 77 counties of Oklahoma, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn OklahomaNationally
Population19,82840th of 771,835th of 3,144
Land area573.9 sq mi64th of 771,739th of 3,144
Population density34.6 per sq mi31st of 771,801st of 3,144
Median household income$48,04171st of 772,869th of 3,143

Full data for Adair County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population19,828Vintage 2025 Population Estimates
Population in 202019,449Vintage 2025 Population Estimates
2020 estimates base?19,496Vintage 2025 Population Estimates
Land area573.9 sq mi2025 Gazetteer Files
Water area3.4 sq mi2025 Gazetteer Files
Total area577.3 sq mi2025 Gazetteer Files
Population density?34.6 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$48,041American Community Survey 2020-2024 5-Year Estimates
Median home value$117,800American Community Survey 2020-2024 5-Year Estimates
Median age37.9American Community Survey 2020-2024 5-Year Estimates
Households7,133American Community Survey 2020-2024 5-Year Estimates
Housing units8,148American 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
-8
300 births, 308 deaths
Net migration
+131
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 6 areas bordering Adair 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
Cherokee CountyOklahoma37 mi49,196
Washington CountyArkansas24 mi271,213
Sequoyah CountyOklahoma19 mi40,842
Delaware CountyOklahoma13 mi41,910
Crawford CountyArkansas8.4 mi62,657
Benton CountyArkansas4.2 mi332,554

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

All 77 counties of Oklahoma

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

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