County Maps US

Sebastian County, Arkansas

A county in Arkansas, ranked 6 of 75 by population.

CountyFIPS 05131

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

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Population
130,641
+2,834 (+2.2%) since 2020
Land area
531.2
square miles. A further 2.4% of the total area is water
Population density
246
people per square mile, computed rather than published
County seat
Fort Smith
Seat of county government.
Established
1851
174 years ago
Largest city
Fort Smith city
Population 90,855.

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 Sebastian 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 Sebastian County, Arkansas 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 556 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 Sebastian County ranks

Position among the 75 counties of Arkansas, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn ArkansasNationally
Population130,6416th of 75506th of 3,144
Land area531.2 sq mi74th of 751,973rd of 3,144
Population density246 per sq mi4th of 75505th of 3,144
Median household income$57,79013th of 752,276th of 3,143

Full data for Sebastian County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population130,641Vintage 2025 Population Estimates
Population in 2020127,807Vintage 2025 Population Estimates
2020 estimates base?127,799Vintage 2025 Population Estimates
Land area531.2 sq mi2025 Gazetteer Files
Water area13.3 sq mi2025 Gazetteer Files
Total area544.5 sq mi2025 Gazetteer Files
Population density?246 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$57,790American Community Survey 2020-2024 5-Year Estimates
Median home value$176,200American Community Survey 2020-2024 5-Year Estimates
Median age38.0American Community Survey 2020-2024 5-Year Estimates
Households52,181American Community Survey 2020-2024 5-Year Estimates
Housing units57,470American 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
+57
1,560 births, 1,503 deaths
Net migration
+250
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 Sebastian 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
Crawford CountyArkansas36 mi62,657
Scott CountyArkansas32 mi9,965
Le Flore CountyOklahoma31 mi50,196
Franklin CountyArkansas21 mi17,725
Logan CountyArkansas14 mi21,633
Sequoyah CountyOklahoma0.5 mi40,842

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

All 75 counties of Arkansas

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

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