County Maps US

Charles Mix County, South Dakota

A county in South Dakota, ranked 21 of 66 by population.

CountyFIPS 46023

Within South Dakota
Charles Mix County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Lake Andes, the county seat, located via the 2025 Census Gazetteer.

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Population
9,303
-50 (-0.5%) since 2020
Land area
1,097
square miles. A further 4.6% of the total area is water
Population density
8.5
people per square mile, computed rather than published
County seat
Lake Andes
Seat of county government.
Established
1862
163 years ago
Largest city
Wagner city
Population 1,422.

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 Charles Mix 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 Charles Mix County, South Dakota 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 609 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 Charles Mix County ranks

Position among the 66 counties of South Dakota, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn South DakotaNationally
Population9,30321st of 662,465th of 3,144
Land area1,097 sq mi27th of 66582nd of 3,144
Population density8.5 per sq mi24th of 662,624th of 3,144
Median household income$64,03853rd of 661,702nd of 3,143

Full data for Charles Mix County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population9,303Vintage 2025 Population Estimates
Population in 20209,353Vintage 2025 Population Estimates
2020 estimates base?9,375Vintage 2025 Population Estimates
Land area1,097 sq mi2025 Gazetteer Files
Water area53.1 sq mi2025 Gazetteer Files
Total area1,150 sq mi2025 Gazetteer Files
Population density?8.5 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$64,038American Community Survey 2020-2024 5-Year Estimates
Median home value$170,600American Community Survey 2020-2024 5-Year Estimates
Median age36.0American Community Survey 2020-2024 5-Year Estimates
Households3,032American Community Survey 2020-2024 5-Year Estimates
Housing units3,668American 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
+26
122 births, 96 deaths
Net migration
-1
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 9 areas bordering Charles Mix 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
Gregory CountySouth Dakota61 mi4,037
Douglas CountySouth Dakota42 mi2,888
Bon Homme CountySouth Dakota41 mi7,244
Brule CountySouth Dakota25 mi5,278
Boyd CountyNebraska14 mi1,674
Knox CountyNebraska8.9 mi8,335
Aurora CountySouth Dakota4.5 mi2,801
Hutchinson CountySouth Dakota3.4 mi7,413
Lyman CountySouth Dakota75 ft3,694

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

All 66 counties of South Dakota

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

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