Clark County, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 41st-largest in South Dakota
The population of Clark County, South Dakota is 3,876 as of the 2023 American Community Survey, making it the 41st-largest county in South Dakota. The median household income is $62,885, the median home value is $141,900, and the median age is 40.6.
The population of Clark County has grown 7.5% since 2010 (3,698 → 3,974), a +0.52% annualized rate.
3,876
Population
+0.52%
Annual growth
4
People / sq mi
$62,885
Median Income
$141,900
Median Home Value
Clark County covers 958 sq mi of land at 4.0 people per square mile.
About Clark County, SD
What sets Clark County apart is where people work — remote work is unusually prominent here, at 17.1% versus 14.0% nationally. Clark County is a county in South Dakota with a population of 3,876. It ranks #41 among counties in South Dakota by population.
The typical household here earns about $62,885, below the US median of $78,538. The poverty rate, 6.4%, is on the lower side for US counties and below the national 12.4%. The typical home is valued at $141,900, with typical rent around $709.
Degree attainment is on the lower side for US counties: 16.2% of adults hold a bachelor’s degree, below the national 35.0%. Remote work is widespread — 17.1% of workers stay home, above the national 14.0%, and the average commute runs about 20 minutes each way.
The remote-work concentration is telling in Clark County — it skews toward higher-income, college-educated workers and reshapes both commute patterns and housing demand.
Clark County Population History (2010-2024)
The county of Clark County had a population of 3,698 in 2010 and 3,974 in 2024, a 7.5% growth over 14 years. The peak was 3,974 in 2024. Average annual growth rate: 0.52%.
3,974
Population (2024)
3,698
Population (2010)
3,974
Peak (2024)
0.52%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 3,698 |
| 2011 | 3,597 |
| 2012 | 3,596 |
| 2013 | 3,627 |
| 2014 | 3,651 |
| 2015 | 3,652 |
| 2016 | 3,634 |
| 2017 | 3,677 |
| 2018 | 3,721 |
| 2019 | 3,740 |
| 2020 | 3,851 |
| 2021 | 3,871 |
| 2022 | 3,945 |
| 2023 | 3,945 |
| 2024 | 3,974 |
Race & Ethnicity
| White | 91.8% |
| Black or African American | 0.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.1% |
| Two or More Races | 0.0% |
Age & Sex
40.6
Median Age
49.0%
Female
51.0%
Male
23.3%
Age 65+
Age Distribution
Children (under 15): 25.1% · Seniors (65+): 23.3%
Income & Poverty
| Median household income | $62,885$-9,536 vs state |
| Mean household income | $88,749 |
| Per-capita income | $34,133 |
| Poverty rate | 6.4%-1.0% vs state |
| Unemployment rate | 2.3% |
| Employment-to-population | 55.7% |
Top Industries by Employment
The largest employment sector in Clark County is agriculture, accounting for 29.8% of workers.
How residents commute
0.0%
Drive alone
4.8%
Carpool
68.7%
Public transit
17.1%
Work from home
19.6 min
Avg commute
Housing
$141,900$-94,900 vs state
Median home value
$709
Median rent
82.3%
Homeownership rate
1,609
Total housing units
82.2%
Occupied
17.8%
Vacant
17.7%
Renter-occupied
Social & access
93.1%
With health insurance
90.8%
With broadband internet
17.1%
Foreign-born
8.4%
Veterans (18+)
10.9%
With a disability
92.6%
Speak language other than English at home
Education
90.0%
High School+
16.2%
Bachelor's+
Largest cities in South Dakota
Other counties in South Dakota
Part of South Dakota
Metro areas in South Dakota
County rankings
Frequently Asked Questions
Clark County, South Dakota has a population of 3,876 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 41st-largest county in South Dakota. Population density is 4 people per square mile.
The population of Clark County has grown 7.5% since 2010 (3,698 → 3,974), a +0.52% annualized rate.
The median household income in Clark County, South Dakota is $62,885, with mean (average) household income of $88,749 and per-capita income of $34,133. 6.4% of residents live below the federal poverty level.
In Clark County, the largest racial and ethnic groups are White (91.8%), Hispanic or Latino (2.1%), Black or African American (0.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Clark County, South Dakota is 40.6 years. Residents are 49.0% female and 51.0% male.
The median home value in Clark County is $141,900 and median monthly rent is $709. 82.3% of occupied housing units are owner-occupied. The county has 1,609 total housing units, 17.8% of which are vacant.
The largest employment sector in Clark County, South Dakota is agriculture, forestry, fishing, and mining, employing 29.8% of workers. The unemployment rate is 2.3%.
Sioux Falls is among the largest cities associated with Clark County, South Dakota, with a population of 197,642.
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Full rankings of South Dakota counties
Statewide data for South Dakota
Population, race, income, age, and trends across South Dakota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.