County Maps US

Stephens County, Oklahoma

A county in Oklahoma, ranked 22 of 77 by population.

CountyFIPS 40137

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

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Population
44,310
+1,475 (+3.4%) since 2020
Land area
870.2
square miles. A further 2.4% of the total area is water
Population density
50.9
people per square mile, computed rather than published
County seat
Duncan
Seat of county government.
Established
1907
118 years ago
Largest city
Duncan city
Population 23,238.

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 Stephens 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 Stephens 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 800 by 673 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 Stephens 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
Population44,31022nd of 771,113th of 3,144
Land area870.2 sq mi34th of 77939th of 3,144
Population density50.9 per sq mi26th of 771,448th of 3,144
Median household income$61,62029th of 771,925th of 3,143

Full data for Stephens County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population44,310Vintage 2025 Population Estimates
Population in 202042,835Vintage 2025 Population Estimates
2020 estimates base?42,856Vintage 2025 Population Estimates
Land area870.2 sq mi2025 Gazetteer Files
Water area21.2 sq mi2025 Gazetteer Files
Total area891.4 sq mi2025 Gazetteer Files
Population density?50.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$61,620American Community Survey 2020-2024 5-Year Estimates
Median home value$145,300American Community Survey 2020-2024 5-Year Estimates
Median age41.0American Community Survey 2020-2024 5-Year Estimates
Households17,567American Community Survey 2020-2024 5-Year Estimates
Housing units20,323American 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
-95
519 births, 614 deaths
Net migration
+180
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 Stephens 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
Jefferson CountyOklahoma33 mi5,431
Grady CountyOklahoma24 mi59,128
Garvin CountyOklahoma18 mi26,377
Cotton CountyOklahoma15 mi5,432
Carter CountyOklahoma15 mi48,910
Comanche CountyOklahoma15 mi122,158

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.