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Day County, SD
9 cities and towns and 7 ZIP codes in Day County, South Dakota.
Population
5,437
Land area
1,028sq mi
People per sq mi
5
ZIP codes
7
Cities and towns in Day County
Day County at a glance
- Day County is 56% less dense than South Dakota as a whole.
- The median household income is $66,033, 12% below the South Dakota median of $75,081.
- A typical owner-occupied home is valued at $173,600 (33% below South Dakota) and median rent is $660 a month.
- Its largest cities are Webster (1,896), Waubay (337) and Enemy Swim (301).
Local data for Day County, SD
Counts from official public data
Housing and community stats
Day County, SD, American Community Survey 2020-2024
Median household income
$66,033
Poverty rate
14.8%
Median home value
$173,600
Median rent
$660/mo
Homeownership
74.6%
Bachelor's or higher
22.0%
Median age
44.8
Average commute
22.3 min
Largest reported origins and ancestries: German Americans (2,129), Norwegian Americans (1,377), Polish Americans (627).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
1.7%
Sep 2026, -0.3 pts in a year
Average annual pay
$47,942
1,966 jobs, 2025
Income per person
$72,389
BEA, 2024
Federal spending
$61.4M
FY 2026, $11,264 per person
PPP loans
$20.1M
889 loans, 2,223 jobs reported
Campaign donations
$75.3K
Itemized, 2026 cycle
How people get to work
Day County, SD, workers 16 and older. American Community Survey 5-year estimates
- Drove alone76.3%
- Carpooled7.4%
- Public transit0.7%
- Walked3.2%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.5%
- Worked from home12.0%
Average one-way commute: 22.3 minutes for people who do not work from home.
Environment and hazard risk
Day County, SD, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: winter weather
Storm events since 1996
676
Most often hail
Flood insurance policies
12
0.3% of homes, county
July high / Jan low
81° / 2°F
26.1 inches of rain a year
Hazards, floods and storm historyCheck a flood zone10 historic places
Health statistics
Share of adults in Day County, SD, CDC PLACES estimates
Obesity
34.8%
U.S. 33.3% +1.5 pts
Diabetes
14.7%
U.S. 12.1% +2.6 pts
Smoking
16.6%
U.S. 12.8% +3.8 pts
Uninsured (18-64)
8.8%
U.S. 11.1% -2.3 pts
Cities, towns and ZIP codes in Day County
Population shown
Frequently asked questions
- What is the largest city in Day County, SD?
- Webster is the largest city or town in Day County, with about 1,896 residents.
- How many ZIP codes are in Day County?
- Day County includes 7 ZIP Code Tabulation Areas, including 57219, 57239, 57261, 57273, 57274.
- What is the population of Day County, SD?
- About 5,437 people live in Day County, based on American Community Survey 5-year estimates.
- What counties border Day County?
- Day County borders Brown County, Codington County, Roberts County, Grant County, Spink County, Marshall County, Clark County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023