County Maps US

Sioux County, Nebraska

A county in Nebraska, ranked 81 of 93 by population.

CountyFIPS 31165

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

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Population
1,188
+42 (+3.7%) since 2020
Land area
2,067
square miles. A further 0.0% of the total area is water
Population density
0.58
people per square mile, computed rather than published
County seat
Harrison
Seat of county government.
Established
1877
148 years ago
Largest city
Harrison village
Population 247.

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 Sioux 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 Sioux County, Nebraska 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 429 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 Sioux County ranks

Position among the 93 counties of Nebraska, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn NebraskaNationally
Population1,18881st of 933,098th of 3,144
Land area2,067 sq mi6th of 93276th of 3,144
Population density0.58 per sq mi91st of 933,111th of 3,144
Median household income$53,92990th of 932,538th of 3,143

Full data for Sioux County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population1,188Vintage 2025 Population Estimates
Population in 20201,146Vintage 2025 Population Estimates
2020 estimates base?1,137Vintage 2025 Population Estimates
Land area2,067 sq mi2025 Gazetteer Files
Water area0.64 sq mi2025 Gazetteer Files
Total area2,067 sq mi2025 Gazetteer Files
Population density?0.58 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$53,929American Community Survey 2020-2024 5-Year Estimates
Median home value$99,300American Community Survey 2020-2024 5-Year Estimates
Median age43.7American Community Survey 2020-2024 5-Year Estimates
Households490American Community Survey 2020-2024 5-Year Estimates
Housing units687American 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
0
15 births, 15 deaths
Net migration
-17
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 Sioux 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 CountyWyoming42 mi12,640
Dawes CountyNebraska42 mi7,858
Scotts Bluff CountyNebraska34 mi35,586
Box Butte CountyNebraska32 mi10,494
Fall River CountySouth Dakota28 mi7,467
Niobrara CountyWyoming27 mi2,341

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

All 93 counties of Nebraska

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

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