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Clark County, SD
13 cities and towns and 6 ZIP codes in Clark County, South Dakota.
Population
3,917
Land area
958sq mi
People per sq mi
4
ZIP codes
6
Cities and towns in Clark County
Clark County at a glance
- Clark County is 66% less dense than South Dakota as a whole.
- Households here earn a median of $70,726 a year, 6% less than the South Dakota figure of $75,081.
- A typical owner-occupied home is valued at $158,400 (38% below South Dakota) and median rent is $782 a month.
- The biggest population centers are Clark (1,359), Willow Lake (433) and Naples (96).
Local data for Clark County, SD
Counts from official public data
Housing and community stats
Clark County, SD, American Community Survey 2020-2024
Median household income
$70,726
Poverty rate
10.9%
Median home value
$158,400
Median rent
$782/mo
Homeownership
77.5%
Bachelor's or higher
19.7%
Median age
40.3
Average commute
20.8 min
Largest reported origins and ancestries: German Americans (1,576), Norwegian Americans (765), Irish Americans (285).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
1.9%
Aug 2026, -0.3 pts in a year
Average annual pay
$47,196
1,205 jobs, 2025
Income per person
$87,398
BEA, 2024
Federal spending
$50.21M
FY 2026, $13,085 per person
PPP loans
$13.34M
638 loans, 1,439 jobs reported
Campaign donations
$19.17K
Itemized, 2026 cycle
How people get to work
Clark County, SD, workers 16 and older. American Community Survey 5-year estimates
- Drove alone68.8%
- Carpooled11.3%
- Public transit0.0%
- Walked2.3%
- Bicycle0.1%
- Taxi, ride-hailing, motorcycle or other0.4%
- Worked from home17.1%
Average one-way commute: 20.8 minutes for people who do not work from home.
Environment and hazard risk
Clark County, SD, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: cold wave
Storm events since 1996
595
Most often hail
Flood insurance policies
10
0.7% of homes, county
July high / Jan low
82° / 4°F
24.4 inches of rain a year
Hazards, floods and storm historyCheck a flood zone14 historic places
Health statistics
Share of adults in Clark County, SD, CDC PLACES estimates
Obesity
34.1%
U.S. 33.3% +0.8 pts
Diabetes
13.1%
U.S. 12.1% +1.0 pts
Smoking
16.5%
U.S. 12.8% +3.7 pts
Uninsured (18-64)
10.4%
U.S. 11.1% -0.7 pts
Cities, towns and ZIP codes in Clark County
Population shown
Frequently asked questions
- What is the largest city in Clark County, SD?
- Clark is the largest city or town in Clark County, with about 1,359 residents.
- How many ZIP codes are in Clark County?
- Clark County includes 6 ZIP Code Tabulation Areas, including 57217, 57225, 57236, 57258, 57271.
- What is the population of Clark County, SD?
- About 3,917 people live in Clark County, based on American Community Survey 5-year estimates.
- What counties border Clark County?
- Clark County borders Codington County, Beadle County, Hamlin County, Spink County, Day County, Kingsbury County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023