County · South Dakota
Bennett County, South Dakota
Bennett County, South Dakota. Bennett County had 3,307 residents in 2025 by the Census Bureau's estimate, down 2.2% since 2020, while South Dakota grew 5.5%. It holds 2 places (1 city, village or borough and 1 census-designated) and 2 census tracts. GEOID 46007.
Residents, July 2025 estimate
3,307
Census Bureau estimate (no margin published)
2020 Census count: 3,381 · ACS 2020-2024: 3,345
Median household income
$53,750
±$17,540 (90% margin)
South Dakota: $75,081
Median home value
$156,400
±$22,228 (90% margin)
South Dakota: $257,400
Median gross rent
$617
±$65 (90% margin)
South Dakota: $946
How many people live in Bennett County, and is it growing?
The 2020 Census counted 3,381 residents in Bennett County. The Census Bureau estimates 3,307 for July 1, 2025, down 2.2% since 2020, while South Dakota grew 5.5%. The 2020-2024 American Community Survey puts the population at 3,345 over 1,185 square miles of land.
| Measure | Bennett County | South Dakota | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,345 | 907,428 | −80 |
| Households | 920±92 | 365,544 | no clear change |
| Average household size | 3.59±0.35 | 2.39 | no clear change |
| Housing units | 1,151±94 | 408,584 | no clear change |
Bennett County's population since 2000
From 3,574 in 2000 to 3,307 in 2025: down 7.5%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Bennett County?
Bennett County holds 2 places: 1 city, village or borough (an incorporated place) and 1 census-designated place. The largest is Martin with 930 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Martin | 938 | $54,063 |
|---|---|---|
| AllenGEOID 4600900 | 460 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Bennett County?
The median resident of Bennett County is 27.4 years old; 35.1% are under 18 and 15.3% are 65 or older. The largest group is non-Hispanic American Indian and Alaska Native residents at 56.0%, then non-Hispanic white residents at 34.3%.
| Measure | Bennett County | South Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median age | 27.4±4.9 | 38.0 | no clear change |
| Under 18 years | 35.1%±3.8 pts | 24.2% | – |
| 65 years and over | 15.3%±2.3 pts | 18.0% | – |
| Hispanic or Latino (any race) | 5.1%±0.5 pts | 4.8% | – |
| White alone, not Hispanic | 34.3%±4.5 pts | 79.8% | no clear change |
| Black or African American alone, not Hispanic | 0.2%±0.3 pts | 2.1% | – |
| Asian alone, not Hispanic | 1.5%±1.5 pts | 1.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 56.0%±5.3 pts | 7.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.9%±2.1 pts | 4.4% | – |
| Some other race alone, not Hispanic | 0.0%±0.7 pts | 0.3% | – |
| Born outside the United States | 1.6%±1.4 pts | 4.0% | – |
| Speak a language other than English at home (age 5+) | 12.0%±6.2 pts | 7.1% | – |
| Civilian veterans (age 18+) | 7.2%±2.6 pts | 7.9% | – |
| With a disability | 8.9%±2.8 pts | 12.5% | – |
| No health insurance coverage | 27.7%±8.0 pts | 9.0% | no clear change |
| High school graduate or higher (age 25+) | 86.3%±4.4 pts | 93.2% | – |
| Bachelor's degree or higher (age 25+) | 18.3%±5.9 pts | 31.9% | no clear change |
| Graduate or professional degree (age 25+) | 3.3%±2.0 pts | 10.0% | – |
| Moved from another state in the past year | 0.0%±0.8 pts | 3.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Bennett County earn?
Half of Bennett County's 920 households earn less than $53,750 a year (±$17,540), against $75,081 in South Dakota. In 2015-2019 it was $58,458 in 2024 dollars; the margins of error cannot tell the two periods apart. 29.9% of residents live below the poverty line.
| Measure | Bennett County | South Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $53,750±$17,540 | $75,081 | no clear change |
| Mean household income | $59,835±$8,912 | $98,527 | – |
| Per capita income | $18,895±$2,784 | $40,550 | no clear change |
| People below the poverty line | 29.9%±9.5 pts | 11.9% | no clear change |
| Children under 18 below the poverty line | 35.0%±16.6 pts | 14.3% | no clear change |
| Households receiving SNAP | 17.0%±6.1 pts | 7.9% | – |
| Households with a broadband subscription | 65.2%±7.2 pts | 89.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Bennett County?
Owners occupy 61.2% of Bennett County's occupied homes and renters 38.8%. The median owner-occupied home is valued at $156,400 by its owner (±$22,228). The median renter pays $617 a month including utilities, and 28.4% of renters pay 35% or more of their income on rent.
| Measure | Bennett County | South Dakota | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $156,400±$22,228 | $257,400 | +$62,990 |
| Median gross rent | $617±$65 | $946 | no clear change |
| Renters paying 35% or more of income on rent | 28.4%±13.6 pts | 30.4% | no clear change |
| Median monthly owner costs, with a mortgage | $1,239±$208 | $1,680 | – |
| Owner-occupied homes | 61.2%±8.8 pts | 68.6% | no clear change |
| Housing units | 1,151±94 | 408,584 | no clear change |
| Homeowner vacancy rate | 0.4%±0.8 pts | 0.8% | – |
| Rental vacancy rate | 6.1%±3.9 pts | 6.0% | – |
| Single-family detached homes | 82.7%±4.7 pts | 66.9% | – |
| Mobile homes | 9.5%±3.8 pts | 7.2% | – |
| Built 2020 or later | 0.0%±2.1 pts | 2.3% | – |
| Built 1939 or earlier | 14.1%±4.5 pts | 15.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Bennett County building?
Builders took permits for 0 new housing units across Bennett County in 2025 (0 single-family), 0.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Bennett County get to work?
81.0% of Bennett County's workers drive alone and 8.0% work from home. The average trip to work takes 12.0 minutes.
| Measure | Bennett County | South Dakota | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 50.2%±6.3 pts | 67.2% | – |
| Unemployment rate | 10.0%±7.8 pts | 2.9% | – |
| Drove alone to work | 81.0%±6.8 pts | 77.0% | – |
| Carpooled | 6.0%±4.0 pts | 8.3% | – |
| Public transportation | 0.0%±2.4 pts | 0.5% | – |
| Walked | 5.0%±3.1 pts | 3.1% | – |
| Worked from home | 8.0%±4.3 pts | 9.7% | – |
| Mean travel time to work | 12.0 min±2.1 | 17.8 min | −5.3 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Bennett County's census tracts?
Bennett County is divided into 2 census tracts.
| Tract 941046007941000 | 1,423±267 | $64,833 |
|---|---|---|
| Tract 941246007941200 | 1,922±267 | $43,971 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Bennett County compare with South Dakota's other counties?
| Measure | Rank |
|---|---|
| Population | 45th of 66 |
| Growth 2020-2025 | 56th of 66 |
| Residents per square mile | 49th of 66 |
| Median household income | 61st of 66 |
| Median home value | 42nd of 66 |
| Median gross rent | 55th of 65 |
| Poverty rate | 9th of 65 |
| Bachelor's degree or higher | 59th of 66 |
| Median age | 63rd of 66 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Bennett County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.