Demographics of Stanley County, South Dakota

Stanley County, South Dakota had 3,018 people on July 1, 2025, by the Census Bureau’s estimate: +52 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.

Stanley County, in four figures

3,018
Population: July 1, 2025, Vintage 2025 estimate.; +1.8%
Change since July 2020: +52 people.; 44.5 ±4.3
Median age: ACS 2020–⁠2024.; $87,712 ±$25,802
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.

Stanley County, South Dakota's population grew 1.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Stanley 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

Stanley County, South Dakota's population grew 1.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Stanley 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	2,966	100.0	100.0
2021	3,031	102.2	100.2
2022	3,010	101.5	100.7
2023	3,026	102.0	101.6
2024	3,001	101.2	102.5
2025	3,018	101.8	103.1

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Population of Stanley County, South Dakota on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From elsewhere in the country
2020	2,966	−12	−6	−5
2021	3,031	+65	+10	+57
2022	3,010	−21	−2	−15
2023	3,026	+16	−12	+27
2024	3,001	−25	−5	−19
2025	3,018	+17	−5	+21

Age, 2020–2024

The median age is 44.5 ±4.3: for men 43.2 ±3.1 and for women 48.7 ±5.8. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Stanley County by age, ACS 2020–2024
Age	People	Share	South Dakota	United States
Under 5	106 ±49	3.5% ±1.6	6.3% ±0.1	5.6% ±<0.1
5 to 17	533 ±99	17.7% ±3.3	17.9% ±0.2	16.3% ±<0.1
18 to 24	177 ±54	5.9% ±1.8	9.3% ±0.4	9.1% ±<0.1
25 to 44	707 ±118	23.4% ±3.9	25.2% ±0.2	26.9% ±<0.1
45 to 64	757 ±123	25.1% ±4.1	23.3% ±0.2	24.8% ±<0.1
65 and over	735 ±141	24.4% ±4.7	18.0% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $87,712 ±$25,802, and income per person $43,482 ±$4,214, 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 Stanley County by income, ACS 2020–2024
Household income	Households	Share	South Dakota	United States
Under $25,000	54 to 190	4.3% to 14.6%	14.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	297 ±105	23.0% ±7.9	18.5% ±0.5	16.7% ±<0.1
$50,000 to $74,999	189 ±70	14.7% ±5.3	17.4% ±0.4	15.5% ±<0.1
$75,000 to $99,999	156 ±63	12.1% ±4.8	14.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	287 ±93	22.2% ±7.0	18.9% ±0.5	17.5% ±<0.1
$150,000 to $199,999	183 ±88	14.2% ±6.7	8.5% ±0.3	9.6% ±<0.1
$200,000 or more	28 to 84	2.2% to 6.5%	8.1% ±0.4	13.4% ±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%.

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 Stanley County by age, ACS 2020–2024
Age	Below poverty	Rate	South Dakota	United States
All ages	36 to 270	1.2% to 9.0%	11.9% ±0.4	12.5% ±0.1
Under 18	27 to 127	4.6% to 19.5%	14.3% ±0.6	16.1% ±0.1
18 to 59	12 to 98	0.9% to 7.2%	11.8% ±0.5	11.6% ±0.1
60 and over	0 to 57	0% to 5.6%	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 Stanley County, ACS 2020–2024
Measure	Stanley County	South Dakota	United States
Housing units	1,542 ±90	408,584 ±422	143,775,355 ±10,234
Occupied	83.7% ±4.3	89.5% ±0.4	89.9% ±0.1
Vacant	16.3% ±6.6	10.5% ±0.4	10.1% ±0.1
Owner occupied	83.1% ±6.2	68.6% ±0.5	65.2% ±0.3
Renter occupied	16.9% ±6.4	31.4% ±0.5	34.8% ±0.1
Median home value	$203,500 ±$67,875	$257,400 ±$3,051	$332,700 ±$236
Median gross rent	$952 ±$132	$946 ±$11	$1,413 ±$2
Median year built	1993 ±2	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 Stanley County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Dakota	United States
Hispanic or Latino	66 ±16	2.2% ±0.5	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	2,651 ±119	87.9% ±3.9	79.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 10	0% to 0.3%	2.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 10	0% to 0.3%	1.4% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 162	0% to 5.4%	7.1% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 10	0% to 0.3%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 65	0% to 2.2%	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	192 ±86	6.4% ±2.9	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 Stanley County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Dakota	United States
Born in the state	2,319 ±140	76.9% ±4.6	62.4% ±0.4	57.3% ±<0.1
Born in another state	643 ±142	21.3% ±4.7	32.9% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 27	0% to 0.9%	0.7% ±0.1	1.7% ±<0.1
Born abroad	7 to 77	0.2% to 2.6%	4.0% ±0.2	14.1% ±<0.1
Naturalized citizens	7 to 77	0.2% to 2.6%	1.7% ±0.1	7.4% ±<0.1
Not citizens	0 to 10	0% to 0.3%	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%.

Stanley County among the counties of South Dakota

47th of 66 by population, July 2025. Every one is listed on the South Dakota page.

Counties of South Dakota near Stanley County in population, July 2025
County	July 2025	Change since 2020
Corson County	3,781	−2.8%
Lyman County	3,694	−0.1%
Hanson County	3,456	−0.3%
Bennett County	3,307	−2.6%
Hand County	3,121	−0.7%
Stanley County	3,018	+1.8%
Douglas County	2,888	+1.9%
Perkins County	2,853	+0.8%
Aurora County	2,801	+2.6%
Jackson County	2,666	−4.8%
Ziebach County	2,389	−0.1%

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