Checked
Bennett County, SD
2 cities and towns and 3 ZIP codes in Bennett County, South Dakota.
Population
3,345
Land area
1,185sq mi
People per sq mi
3
ZIP codes
3
Cities and towns in Bennett County
Bennett County at a glance
- Bennett County is 76% less dense than South Dakota as a whole.
- Households here earn a median of $53,750 a year, 28% less than the South Dakota figure of $75,081.
- A typical owner-occupied home is valued at $156,400 (39% below South Dakota) and median rent is $617 a month.
- The biggest population centers are Martin (947) and Allen (783).
Local data for Bennett County, SD
Counts from official public data
Housing and community stats
Bennett County, SD, American Community Survey 2020-2024
Median household income
$53,750
Poverty rate
29.9%
Median home value
$156,400
Median rent
$617/mo
Homeownership
61.2%
Bachelor's or higher
18.3%
Median age
27.4
Average commute
12.0 min
Largest reported origins and ancestries: German Americans (411), Irish Americans (110), Mexican Americans (101).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
2.8%
Aug 2026, +0.5 pts in a year
Average annual pay
$44,075
844 jobs, 2025
Income per person
$50,050
BEA, 2024
Federal spending
$32.69M
FY 2026, $9,668 per person
PPP loans
$6.7M
286 loans, 668 jobs reported
Campaign donations
$4,790
Itemized, 2026 cycle
How people get to work
Bennett County, SD, workers 16 and older. American Community Survey 5-year estimates
- Drove alone81.0%
- Carpooled6.0%
- Public transit0.0%
- Walked5.0%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.0%
- Worked from home8.0%
Average one-way commute: 12.0 minutes for people who do not work from home.
Environment and hazard risk
Bennett County, SD, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: wildfire
Storm events since 1996
554
Most often hail
July high / Jan low
87° / 13°F
20.7 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Bennett County, SD, CDC PLACES estimates
Obesity
42.4%
U.S. 33.3% +9.1 pts
Diabetes
18.7%
U.S. 12.1% +6.6 pts
Smoking
28.0%
U.S. 12.8% +15.2 pts
Uninsured (18-64)
13.7%
U.S. 11.1% +2.6 pts
Cities, towns and ZIP codes in Bennett County
Population shown
Frequently asked questions
- What is the largest city in Bennett County, SD?
- Martin is the largest city or town in Bennett County, with about 947 residents.
- How many ZIP codes are in Bennett County?
- Bennett County includes 3 ZIP Code Tabulation Areas, including 57551, 57574, 57714.
- What is the population of Bennett County, SD?
- About 3,345 people live in Bennett County, based on American Community Survey 5-year estimates.
- What counties border Bennett County?
- Bennett County borders Oglala Lakota County, Todd County, Cherry County, NE, Jackson County, Mellette County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023