County Maps US

Kay County, Oklahoma

A county in Oklahoma, ranked 23 of 77 by population.

CountyFIPS 40071

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

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Population
43,490
-115 (-0.3%) since 2020
Land area
919.6
square miles. A further 2.7% of the total area is water
Population density
47.3
people per square mile, computed rather than published
County seat
Newkirk
Seat of county government.
Established
1895
130 years ago
Largest city
Ponca City city
Population 24,225.

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 Kay 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 Kay 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 593 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 Kay 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
Population43,49023rd of 771,129th of 3,144
Land area919.6 sq mi28th of 77798th of 3,144
Population density47.3 per sq mi27th of 771,529th of 3,144
Median household income$58,42344th of 772,230th of 3,143

Full data for Kay County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population43,490Vintage 2025 Population Estimates
Population in 202043,605Vintage 2025 Population Estimates
2020 estimates base?43,701Vintage 2025 Population Estimates
Land area919.6 sq mi2025 Gazetteer Files
Water area25.3 sq mi2025 Gazetteer Files
Total area944.9 sq mi2025 Gazetteer Files
Population density?47.3 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$58,423American Community Survey 2020-2024 5-Year Estimates
Median home value$124,700American Community Survey 2020-2024 5-Year Estimates
Median age38.5American Community Survey 2020-2024 5-Year Estimates
Households16,776American Community Survey 2020-2024 5-Year Estimates
Housing units20,913American 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
-49
540 births, 589 deaths
Net migration
-100
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 Kay 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
Osage CountyOklahoma47 mi46,794
Grant CountyOklahoma28 mi4,067
Noble CountyOklahoma22 mi10,899
Cowley CountyKansas22 mi34,382
Sumner CountyKansas17 mi22,312
Garfield CountyOklahoma253 ft61,779

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.