Clark County, South Dakota

Clark County, South Dakota, had an estimated population of 4,031 in 2025 across 2,480 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among South Dakota's counties and nationally.

Population: 4,031; 2025 estimate
Area: 2,480 km²
Density: 2; per km²
Median income: $70,726; household, ACS 2024
Median age: 40.3; years, ACS 2024

How South Dakota's counties spread

Amenities & Infrastructure

Indicator	Value	In South Dakota	In the US
Households with Broadband2024	85.8%	38 / 66	1,843 / 3,144
Median Gross Rent2024	$782	27 / 66	2,240 / 3,137
Median Home Value2024	$158,400	40 / 66	2,059 / 3,139
Owner-Occupied Homes2024	77.5%	21 / 66	1,031 / 3,144
Vacant Homes2024	17.0%	33 / 66	1,150 / 3,144

Demography

Indicator	Value	In South Dakota	In the US
Aged 65 and Over2024	23.5%	22 / 66	683 / 3,144
American Indian & Alaska Native2024	0.6%	51 / 66	629 / 3,144
Asian, non-Hispanic2024	0.7%	16 / 66	1,366 / 3,144
Average Household Size2024people	2.8	15 / 66	207 / 3,144
Black, non-Hispanic2024	0.5%	26 / 66	2,443 / 3,144
Foreign-Born2024	2.7%	19 / 66	1,634 / 3,144
Hispanic or Latino2024	5.3%	12 / 66	1,517 / 3,144
Median Age2024years	40.3	38 / 66	1,938 / 3,144
Sex Ratio2024per 1,000 males	993	27 / 66	1,744 / 3,144
Speak a Language Other Than English2024	6.8%	14 / 66	1,301 / 3,144
Under 182024	29.4%	11 / 66	89 / 3,144
Veterans2024	7.7%	25 / 66	1,231 / 3,144
White, non-Hispanic2024	90.7%	18 / 66	697 / 3,144

Economy

Indicator	Value	In South Dakota	In the US
Below Poverty Line2024	10.9%	34 / 66	2,152 / 3,144
Households on SNAP2024	1.9%	62 / 66	3,109 / 3,144
Income Inequality2024index	0.441	38 / 66	1,772 / 3,144
Median Household Income2024	$70,726	37 / 66	1,145 / 3,143
Per Capita Income2024	$34,226	50 / 66	1,723 / 3,144
Unemployment Rate2024	4.0%	15 / 66	1,816 / 3,144

Education

Indicator	Value	In South Dakota	In the US
Bachelor's Degree or Higher2024	19.7%	53 / 66	1,978 / 3,144
High School or Higher2024	90.6%	49 / 66	1,469 / 3,144

Health Coverage

Indicator	Value	In South Dakota	In the US
No Health Insurance2024	7.0%	36 / 66	1,805 / 3,144
With a Disability2024	11.2%	44 / 66	2,841 / 3,144

Population & Density

Indicator	Value	In South Dakota	In the US
Population2025	4,031	40 / 66	2,884 / 3,144
Population Density2025/km²	2	29 / 66	2,706 / 3,144

Work & Commute

Indicator	Value	In South Dakota	In the US
Commute by Public Transit2024	0.0%	32 / 66	2,161 / 3,144
Households with No Vehicle2024	5.3%	27 / 66	1,603 / 3,144
Mean Commute Time2024minutes	20.8	14 / 66	2,311 / 3,143
Work from Home2024	17.1%	8 / 66	255 / 3,144

Other counties of South Dakota

Compare Clark County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.