Roberts County, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 18th-largest in South Dakota
The population of Roberts County, South Dakota is 10,219 as of the 2023 American Community Survey, making it the 18th-largest county in South Dakota. The median household income is $63,691, the median home value is $139,100, and the median age is 37.9.
The population of Roberts County has grown 0.9% since 2010 (10,189 → 10,283), a +0.07% annualized rate.
10,219
Population
+0.07%
Annual growth
9
People / sq mi
$63,691
Median Income
$139,100
Median Home Value
Roberts County covers 1,101 sq mi of land at 9.3 people per square mile.
About Roberts County, SD
What distinguishes Roberts County is density: among the most sparsely settled of US counties, around 9 people per square mile. Roberts County is a county in South Dakota with a population of 10,219. It ranks #18 among counties in South Dakota by population.
The typical household here earns about $63,691, below the US median of $78,538. The poverty rate is 13.8%, above the national 12.4%. Median home value is $139,100, with typical rent around $656.
Degree attainment is mid-range for US counties: 18.3% of adults hold a four-year degree, below the national 35.0%. Around 7.7% of workers work from home, below the national 14.0%, and the average commute runs about 16 minutes each way.
Roberts County Population History (2010-2024)
The county of Roberts County had a population of 10,189 in 2010 and 10,283 in 2024, a 0.9% growth over 14 years. The peak was 10,399 in 2019. Average annual growth rate: 0.07%.
10,283
Population (2024)
10,189
Population (2010)
10,399
Peak (2019)
0.07%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 10,189 |
| 2011 | 10,291 |
| 2012 | 10,323 |
| 2013 | 10,238 |
| 2014 | 10,280 |
| 2015 | 10,210 |
| 2016 | 10,192 |
| 2017 | 10,269 |
| 2018 | 10,358 |
| 2019 | 10,399 |
| 2020 | 10,262 |
| 2021 | 10,180 |
| 2022 | 10,157 |
| 2023 | 10,222 |
| 2024 | 10,283 |
Race & Ethnicity
| White | 57.9% |
| Black or African American | 0.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 39.3% |
| Two or More Races | 0.0% |
Age & Sex
37.9
Median Age
48.5%
Female
51.5%
Male
20.5%
Age 65+
Age Distribution
Children (under 15): 23.5% · Seniors (65+): 20.5%
Income & Poverty
| Median household income | $63,691$-8,730 vs state |
| Mean household income | $79,910 |
| Per-capita income | $31,216 |
| Poverty rate | 13.8%+6.4% vs state |
| Unemployment rate | 3.7% |
| Employment-to-population | 56.6% |
Top Industries by Employment
The largest employment sector in Roberts County is professional & business services, accounting for 24.6% of workers.
How residents commute
1.0%
Drive alone
4.4%
Carpool
77.2%
Public transit
7.7%
Work from home
16.4 min
Avg commute
Housing
$139,100$-97,700 vs state
Median home value
$656
Median rent
69.4%
Homeownership rate
4,823
Total housing units
75.8%
Occupied
24.2%
Vacant
30.6%
Renter-occupied
Social & access
80.1%
With health insurance
86.6%
With broadband internet
31.4%
Foreign-born
7.6%
Veterans (18+)
10.2%
With a disability
96.9%
Speak language other than English at home
Education
91.7%
High School+
18.3%
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
Roberts County, South Dakota has a population of 10,219 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 18th-largest county in South Dakota. Population density is 9 people per square mile.
The population of Roberts County has grown 0.9% since 2010 (10,189 → 10,283), a +0.07% annualized rate.
The median household income in Roberts County, South Dakota is $63,691, with mean (average) household income of $79,910 and per-capita income of $31,216. 13.8% of residents live below the federal poverty level.
In Roberts County, the largest racial and ethnic groups are White (57.9%), Hispanic or Latino (39.3%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Roberts County, South Dakota is 37.9 years. Residents are 48.5% female and 51.5% male.
The median home value in Roberts County is $139,100 and median monthly rent is $656. 69.4% of occupied housing units are owner-occupied. The county has 4,823 total housing units, 24.2% of which are vacant.
The largest employment sector in Roberts County, South Dakota is professional, scientific, and management services, employing 24.6% of workers. The unemployment rate is 3.7%.
Sioux Falls is among the largest cities associated with Roberts County, South Dakota, with a population of 197,642.
Roberts County, SD Climate
Roberts County, SD has an average annual temperature of 6.5°C (44°F) and receives about 537 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
6.5°C
Avg Temp
537
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -12° / 11° | 13 mm |
| February | -8° / 18° | 14 mm |
| March | -1° / 30° | 33 mm |
| April | 7° / 45° | 56 mm |
| May | 15° / 58° | 73 mm |
| June | 19° / 67° | 80 mm |
| July | 22° / 72° | 75 mm |
| August | 21° / 70° | 69 mm |
| September | 16° / 60° | 50 mm |
| October | 9° / 47° | 39 mm |
| November | -1° / 30° | 22 mm |
| December | -9° / 16° | 13 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Roberts County, SD
The most comfortable months to visit Roberts County, SD are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -17°C low). June is usually the wettest month.
Where to stay near Roberts County
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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.