Corson County, South Dakota

Corson County population, land area and income

Corson County had 3,747 residents in the Census Vintage 2024 estimate, on 2,469.7 square miles of land. It ranks 42nd of 66 in South Dakota by population and 5th by land area. That works out to 1.5 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in South Dakota has 5,296 residents; Corson County is somewhat smaller.

Its SAIPE 2023 median household income of $42,911 is in the bottom quarter among 3,143 counties with an estimate.

How Corson County's population changed since 2020

Corson County lost 141 residents between the July 2020 and July 2024 estimates, a drop of 3.6%. That ranks 61st of 66 in South Dakota for growth. The median South Dakota county changed by +0.8%, and the state as a whole by +4.1%.

Since the April 2020 estimates base, Corson County recorded 331 births and 282 deaths, a natural change of +49. Net international migration added +0 and net domestic migration, people moving to or from other US counties, came to -195. The largest single component was domestic migration, which removed 195 people.

Where Corson County is

The Census internal point of Corson County is at 45.685700, -101.179700. It sits in UTM zone 14N. The map shades South Dakota's 66 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Corson County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Corson County

No incorporated place of 1,000 or more people has residents in Corson County. Its 3,747 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Corson County

The Census 2024 county adjacency file lists 8 neighbors for Corson County, including 3 across a state line. The most populous is Dewey County, SD, with 5,322 residents. Distances run between Census internal points in a straight line.

• Dewey County

  5,322 people

  41 mi SSE

• Walworth County

  5,270 people

  59 mi ESE

• ND

  Sioux County, ND

  3,713 people

  30 mi N

• ND

  Emmons County, ND

  3,209 people

  61 mi NE

• Perkins County

  2,832 people

  64 mi WSW

• Ziebach County

  2,418 people

  53 mi SSW

• ND

  Adams County, ND

  2,141 people

  71 mi WNW

• Campbell County

  1,342 people

  57 mi E

Distance to Pierre and the nearest big city

Pierre is 99.8 miles SSE of Corson County's internal point in a straight line. The nearest place of 100,000 or more is Fargo, ND (population 136,285), 223.1 miles away. The nearest place of 10,000 or more is Mandan, ND (population 24,788), 80.3 miles away.

Corson County FIPS code

The FIPS code of Corson County is 46031: state code 46 for South Dakota plus county code 031. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $42,911.