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Jefferson, SD
City in Union County, South Dakota.
Population
554
Land area
0.5sq mi
People per sq mi
1,085
ZIP codes
0
Jefferson and its ZIP codes
Jefferson at a glance
- Jefferson is about 91 times as dense as South Dakota as a whole.
- The median household income is $82,888, 10% above the South Dakota median of $75,081.
- A typical owner-occupied home is valued at $179,400 (30% below South Dakota).
Local data for Jefferson, SD
Counts from official public data
Housing and community stats
Jefferson, SD, American Community Survey 2020-2024
Median household income
$82,888
Poverty rate
4.9%
Median home value
$179,400
Homeownership
91.0%
Bachelor's or higher
23.2%
Median age
40.6
Average commute
22.0 min
Largest reported origins and ancestries: German Americans (109), Irish Americans (56), Mexican Americans (40).
Economy and federal money
Jobs, pay, income and spending are for Union County. PPP loans are for Jefferson.
Unemployment rate
2.6%
Aug 2026, +0.4 pts in a year
Average annual pay
$74,563
9,566 jobs, 2025
Income per person
$146,712
BEA, 2024
Federal spending
$220M
FY 2026, $13,086 per person
How people get to work
Jefferson, SD, workers 16 and older. American Community Survey 5-year estimates
- Drove alone76.2%
- Carpooled6.2%
- Public transit0.0%
- Walked3.7%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other5.9%
- Worked from home8.1%
Average one-way commute: 22.0 minutes for people who do not work from home.
Environment and hazard risk
Jefferson, SD, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: wildfire
Storm events since 1996
773
Countywide, mostly flood
Flood insurance policies
199
2.5% of homes, county
July high / Jan low
86° / 9°F
30.3 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Jefferson, SD, CDC PLACES estimates
Obesity
32.3%
U.S. 33.3% -1.0 pts
Diabetes
10.7%
U.S. 12.1% -1.4 pts
Smoking
14.5%
U.S. 12.8% +1.7 pts
Uninsured (18-64)
8.3%
U.S. 11.1% -2.8 pts
Cities near Jefferson
| Name | Distance | Land area (sq mi) |
|---|---|---|
| North Sioux CityCity | 6.1 mi | 3.3 |
| Ponca, NECity | 7.9 mi | 0.8 |
| Elk PointCity | 8 mi | 1.5 |
| Dakota DunesCensus-designated place | 8.3 mi | 2.5 |
| Jackson, NEVillage | 11 mi | 0.5 |
| Westfield, IACity | 11 mi | 0.1 |
| RichlandCensus-designated place | 12 mi | 5.6 |
| South Sioux City, NECity | 13 mi | 6.7 |
| Waterbury, NEVillage | 13 mi | 0.1 |
| Hinton, IACity | 14 mi | 0.9 |
| Sioux City, IACity | 14 mi | 59.2 |
| Dakota City, NECity | 15 mi | 1.4 |
| Martinsburg, NEVillage | 15 mi | 0.1 |
| Hubbard, NEVillage | 15 mi | 0.1 |
| Akron, IACity | 15 mi | 1.2 |
| Newcastle, NEVillage | 16 mi | 0.3 |
Frequently asked questions
- What county is Jefferson, SD in?
- Jefferson is in Union County, South Dakota.
- What is the population of Jefferson, SD?
- About 554 people live in Jefferson, based on American Community Survey 5-year estimates.
- What cities are near Jefferson?
- Nearby places include North Sioux City (6.1 mi), Ponca, NE (7.9 mi), Elk Point (8 mi), Dakota Dunes (8.3 mi), Jackson, NE (11 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023