Grant County, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 23rd-largest in South Dakota
The population of Grant County, South Dakota is 7,544 as of the 2023 American Community Survey, making it the 23rd-largest county in South Dakota. The median household income is $73,818, the median home value is $179,400, and the median age is 43.7.
The population of Grant County has grown 3.6% since 2010 (7,351 → 7,618), a +0.26% annualized rate.
7,544
Population
+0.26%
Annual growth
11
People / sq mi
$73,818
Median Income
$179,400
Median Home Value
Grant County covers 681 sq mi of land at 11.1 people per square mile.
About Grant County, SD
Homeownership is the standout figure in Grant County: 81.6% of homes are owner-occupied, higher than the national rate. Grant County is a county in South Dakota with a population of 7,544. It ranks #23 among counties in South Dakota by population.
The typical household earns $73,818 a year, below the US median of $78,538. The poverty rate, 6.4%, is on the lower side for US counties and below the national 12.4%. Median home value is $179,400, with typical rent around $668.
25.5% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Around 9.7% of workers work from home, below the national 14.0%, and the average commute runs about 15 minutes each way.
The ownership rate anchors the housing story in Grant County, and tends to move with the age structure and home-value figures above.
Grant County Population History (2010-2024)
The county of Grant County had a population of 7,351 in 2010 and 7,618 in 2024, a 3.6% growth over 14 years. The peak was 7,618 in 2024. Average annual growth rate: 0.27%.
7,618
Population (2024)
7,351
Population (2010)
7,618
Peak (2024)
0.27%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 7,351 |
| 2011 | 7,358 |
| 2012 | 7,401 |
| 2013 | 7,390 |
| 2014 | 7,315 |
| 2015 | 7,221 |
| 2016 | 7,223 |
| 2017 | 7,179 |
| 2018 | 7,123 |
| 2019 | 7,102 |
| 2020 | 7,539 |
| 2021 | 7,554 |
| 2022 | 7,535 |
| 2023 | 7,571 |
| 2024 | 7,618 |
Race & Ethnicity
| White | 91.1% |
| Black or African American | 0.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.4% |
| Two or More Races | 0.0% |
Age & Sex
43.7
Median Age
47.3%
Female
52.7%
Male
23.0%
Age 65+
Age Distribution
Children (under 15): 17.4% · Seniors (65+): 23.0%
Income & Poverty
| Median household income | $73,818+$1,397 vs state |
| Mean household income | $92,573 |
| Per-capita income | $38,497 |
| Poverty rate | 6.4%-1.0% vs state |
| Unemployment rate | 2.5% |
| Employment-to-population | 65.9% |
Top Industries by Employment
The largest employment sector in Grant County is professional & business services, accounting for 22.0% of workers.
How residents commute
0.0%
Drive alone
4.4%
Carpool
75.3%
Public transit
9.7%
Work from home
15.1 min
Avg commute
Housing
$179,400$-57,400 vs state
Median home value
$668
Median rent
81.6%
Homeownership rate
3,441
Total housing units
86.9%
Occupied
13.1%
Vacant
18.4%
Renter-occupied
Social & access
90.1%
With health insurance
90.2%
With broadband internet
43.0%
Foreign-born
6.8%
Veterans (18+)
14.9%
With a disability
89.6%
Speak language other than English at home
Education
92.1%
High School+
25.5%
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
Grant County, South Dakota has a population of 7,544 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 23rd-largest county in South Dakota. Population density is 11 people per square mile.
The population of Grant County has grown 3.6% since 2010 (7,351 → 7,618), a +0.26% annualized rate.
The median household income in Grant County, South Dakota is $73,818, with mean (average) household income of $92,573 and per-capita income of $38,497. 6.4% of residents live below the federal poverty level.
In Grant County, the largest racial and ethnic groups are White (91.1%), Hispanic or Latino (3.4%), Black or African American (0.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Grant County, South Dakota is 43.7 years. Residents are 47.3% female and 52.7% male.
The median home value in Grant County is $179,400 and median monthly rent is $668. 81.6% of occupied housing units are owner-occupied. The county has 3,441 total housing units, 13.1% of which are vacant.
The largest employment sector in Grant County, South Dakota is professional, scientific, and management services, employing 22.0% of workers. The unemployment rate is 2.5%.
Sioux Falls is among the largest cities associated with Grant County, South Dakota, with a population of 197,642.
Grant County, SD Climate
Grant County, SD has an average annual temperature of 6.6°C (44°F) and receives about 557 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
6.6°C
Avg Temp
557
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -11° / 11° | 13 mm |
| February | -8° / 18° | 12 mm |
| March | -1° / 30° | 35 mm |
| April | 7° / 45° | 57 mm |
| May | 14° / 58° | 68 mm |
| June | 20° / 67° | 89 mm |
| July | 22° / 72° | 83 mm |
| August | 21° / 70° | 69 mm |
| September | 16° / 60° | 51 mm |
| October | 9° / 48° | 45 mm |
| November | -1° / 30° | 25 mm |
| December | -8° / 17° | 10 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 Grant County, SD
The most comfortable months to visit Grant 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 Grant 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.