Bennett County, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 45th-largest in South Dakota
The population of Bennett County, South Dakota is 3,354 as of the 2023 American Community Survey, making it the 45th-largest county in South Dakota. The median household income is $44,569, the median home value is $138,600, and the median age is 28.8.
The population of Bennett County has declined 4.7% since 2010 (3,451 → 3,289), a -0.34% annualized rate.
3,354
Population
-0.34%
Annual growth
3
People / sq mi
$44,569
Median Income
$138,600
Median Home Value
Bennett County covers 1,185 sq mi of land at 2.8 people per square mile.
About Bennett County, SD
Bennett County is a county in South Dakota with a population of 3,354. It ranks #45 among counties in South Dakota by population. The median age is 28.8, younger than the national median. The population is 47.3% male and 52.7% female.
The median household income in Bennett County is $44,569, below the US median of $74,580. 31.1% of residents live below the federal poverty level. Home values sit at a median of $138,600, with monthly rent averaging $616. The homeownership rate of 57.7% is lower than the national rate of 64.8%.
Educational attainment in Bennett County reflects 20.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 5.9% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 13.0 minutes each way.
Bennett County Population History (2010-2024)
The county of Bennett County had a population of 3,451 in 2010 and 3,289 in 2024, a -4.7% growth over 14 years. The peak was 3,482 in 2018. Average annual growth rate: -0.34%.
3,289
Population (2024)
3,451
Population (2010)
3,482
Peak (2018)
-0.34%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 3,451 |
| 2011 | 3,450 |
| 2012 | 3,451 |
| 2013 | 3,467 |
| 2014 | 3,440 |
| 2015 | 3,407 |
| 2016 | 3,458 |
| 2017 | 3,447 |
| 2018 | 3,482 |
| 2019 | 3,364 |
| 2020 | 3,392 |
| 2021 | 3,393 |
| 2022 | 3,339 |
| 2023 | 3,312 |
| 2024 | 3,289 |
Race & Ethnicity
| White | 37.3% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 59.5% |
| Two or More Races | 0.0% |
Age & Sex
28.8
Median Age
52.7%
Female
47.3%
Male
15.3%
Age 65+
Age Distribution
Children (under 15): 27.6% · Seniors (65+): 15.3%
Income & Poverty
| Median household income | $44,569$-27,852 vs state |
| Mean household income | $59,699 |
| Per-capita income | $21,005 |
| Poverty rate | 31.1%+23.7% vs state |
| Unemployment rate | 5.0% |
| Employment-to-population | 46.1% |
Top Industries by Employment
The largest employment sector in Bennett County is professional & business services, accounting for 38.8% of workers.
How residents commute
0.0%
Drive alone
7.7%
Carpool
80.3%
Public transit
5.9%
Work from home
13.0 min
Avg commute
Housing
$138,600$-98,200 vs state
Median home value
$616
Median rent
57.7%
Homeownership rate
1,232
Total housing units
83.1%
Occupied
16.9%
Vacant
42.3%
Renter-occupied
Social & access
70.9%
With health insurance
80.8%
With broadband internet
22.8%
Foreign-born
6.3%
Veterans (18+)
9.6%
With a disability
88.3%
Speak language other than English at home
Education
86.9%
High School+
20.3%
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
Bennett County, South Dakota has a population of 3,354 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 45th-largest county in South Dakota. Population density is 3 people per square mile.
The population of Bennett County has declined 4.7% since 2010 (3,451 → 3,289), a -0.34% annualized rate.
The median household income in Bennett County, South Dakota is $44,569, with mean (average) household income of $59,699 and per-capita income of $21,005. 31.1% of residents live below the federal poverty level.
In Bennett County, the largest racial and ethnic groups are Hispanic or Latino (59.5%), White (37.3%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Bennett County, South Dakota is 28.8 years. Residents are 52.7% female and 47.3% male.
The median home value in Bennett County is $138,600 and median monthly rent is $616. 57.7% of occupied housing units are owner-occupied. The county has 1,232 total housing units, 16.9% of which are vacant.
The largest employment sector in Bennett County, South Dakota is professional, scientific, and management services, employing 38.8% of workers. The unemployment rate is 5.0%.
Sioux Falls is among the largest cities associated with Bennett County, South Dakota, with a population of 197,642.
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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.