Demographics of Grant County, South Dakota

Grant County, South Dakota had 7,534 people on July 1, 2025, by the Census Bureau’s estimate: −3 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Grant County, in four figures

7,534
Population: July 1, 2025, Vintage 2025 estimate.; > −0.1%
Change since July 2020: −3 people.; 44.5 ±0.8
Median age: ACS 2020–⁠2024.; $75,028 ±$9,695
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Grant County, South Dakota's population shrank < 0.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Grant County, South Dakota's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Grant County, South Dakota's population shrank < 0.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Grant County, South Dakota's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	7,537	100.0	100.0
2021	7,557	100.3	100.2
2022	7,537	100.0	100.7
2023	7,556	100.3	101.6
2024	7,613	101.0	102.5
2025	7,534	100.0	103.1

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Population of Grant County, South Dakota on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	7,537	−24	0	0	−21
2021	7,557	+20	−16	+9	+19
2022	7,537	−20	−18	+65	−69
2023	7,556	+19	−25	+18	+25
2024	7,613	+57	−34	+60	+33
2025	7,534	−79	−34	+18	−63

Age, 2020–2024

The median age is 44.5 ±0.8: for men 41.2 ±2.3 and for women 45.7 ±1.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Grant County by age, ACS 2020–2024
Age	People	Share	South Dakota	United States
Under 5	398 ±15	5.3% ±0.2	6.3% ±0.1	5.6% ±<0.1
5 to 17	1,279 ±133	16.9% ±1.8	17.9% ±0.2	16.3% ±<0.1
18 to 24	619 ±153	8.2% ±2.0	9.3% ±0.4	9.1% ±<0.1
25 to 44	1,542 ±171	20.4% ±2.3	25.2% ±0.2	26.9% ±<0.1
45 to 64	1,958 ±188	25.9% ±2.5	23.3% ±0.2	24.8% ±<0.1
65 and over	1,767 ±222	23.4% ±2.9	18.0% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $75,028 ±$9,695, and income per person $37,694 ±$3,230, in 2024 dollars. The median is $75,081 ±$888 in South Dakota and $80,734 ±$166 in the United States.

Households by income

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Households in Grant County by income, ACS 2020–2024
Household income	Households	Share	South Dakota	United States
Under $25,000	517 ±158	17.1% ±5.1	14.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	537 ±149	17.7% ±4.8	18.5% ±0.5	16.7% ±<0.1
$50,000 to $74,999	460 ±135	15.2% ±4.4	17.4% ±0.4	15.5% ±<0.1
$75,000 to $99,999	456 ±126	15.1% ±4.1	14.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	692 ±151	22.8% ±4.8	18.9% ±0.5	17.5% ±<0.1
$150,000 to $199,999	177 ±69	5.8% ±2.3	8.5% ±0.3	9.6% ±<0.1
$200,000 or more	190 ±72	6.3% ±2.4	8.1% ±0.4	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Grant County by age, ACS 2020–2024
Age	Below poverty	Rate	South Dakota	United States
All ages	847 ±278	11.6% ±3.8	11.9% ±0.4	12.5% ±0.1
Under 18	99 to 293	12.5% ±6.0	14.3% ±0.6	16.1% ±0.1
18 to 59	427 ±192	12.7% ±5.6	11.8% ±0.5	11.6% ±0.1
60 and over	224 ±109	9.4% ±4.5	9.7% ±0.4	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Grant County, ACS 2020–2024
Measure	Grant County	South Dakota	United States
Housing units	3,456 ±19	408,584 ±422	143,775,355 ±10,234
Occupied	87.6% ±4.6	89.5% ±0.4	89.9% ±0.1
Vacant	12.4% ±4.6	10.5% ±0.4	10.1% ±0.1
Owner occupied	75.6% ±3.9	68.6% ±0.5	65.2% ±0.3
Renter occupied	24.4% ±4.2	31.4% ±0.5	34.8% ±0.1
Median home value	$171,000 ±$14,506	$257,400 ±$3,051	$332,700 ±$236
Median gross rent	$763 ±$116	$946 ±$11	$1,413 ±$2
Median year built	1972 ±3	1980 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Grant County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Dakota	United States
Hispanic or Latino	559 ±0	7.4% ±<0.1	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	6,751 ±9	89.3% ±0.1	79.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 106	0% to 1.4%	2.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 156	0% to 2.1%	1.4% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 46	0% to 0.6%	7.1% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 15	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 15	0% to 0.2%	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	42 to 248	0.6% to 3.3%	4.4% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Grant County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Dakota	United States
Born in the state	3,697 ±319	48.9% ±4.2	62.4% ±0.4	57.3% ±<0.1
Born in another state	3,289 ±330	43.5% ±4.4	32.9% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 175	0% to 2.3%	0.7% ±0.1	1.7% ±<0.1
Born abroad	494 ±170	6.5% ±2.2	4.0% ±0.2	14.1% ±<0.1
Naturalized citizens	2 to 230	< 0.1% to 3.0%	1.7% ±0.1	7.4% ±<0.1
Not citizens	378 ±151	5.0% ±2.0	2.3% ±0.2	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Grant County among the counties of South Dakota

23rd of 66 by population, July 2025. Every one is listed on the South Dakota page.

Counties of South Dakota near Grant County in population, July 2025
County	July 2025	Change since 2020
Roberts County	10,255	−0.1%
Custer County	9,431	+13.2%
Turner County	9,314	+7.3%
Charles Mix County	9,303	−0.5%
Todd County	8,863	−4.9%
Grant County	7,534	> −0.1%
Fall River County	7,467	+7.1%
Hutchinson County	7,413	−0.1%
Bon Homme County	7,244	+3.8%
Hamlin County	6,900	+11.8%
Moody County	6,632	+4.5%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026