Demographics of Oglala Lakota County, South Dakota

Oglala Lakota County, South Dakota had 13,338 people on July 1, 2025, by the Census Bureau’s estimate: −309 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.

Oglala Lakota County, in four figures

13,338
Population: July 1, 2025, Vintage 2025 estimate.; −2.3%
Change since July 2020: −309 people.; 28.2 ±2.3
Median age: ACS 2020–⁠2024.; $41,417 ±$14,548
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.

Oglala Lakota County, South Dakota's population shrank 2.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Oglala Lakota 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).

Source: The Census Bureau

About this chart

The figures

Oglala Lakota County, South Dakota's population shrank 2.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Oglala Lakota 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	13,647	100.0	100.0
2021	13,545	99.3	100.2
2022	13,475	98.7	100.7
2023	13,423	98.4	101.6
2024	13,416	98.3	102.5
2025	13,338	97.7	103.1

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Population of Oglala Lakota County, South Dakota on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From elsewhere in the country
2020	13,647	−26	+11	−38
2021	13,545	−102	+19	−121
2022	13,475	−70	+31	−94
2023	13,423	−52	+71	−125
2024	13,416	−7	+98	−105
2025	13,338	−78	+92	−170

Age, 2020–2024

The median age is 28.2 ±2.3: for men 24.7 ±1.6 and for women 29.9 ±1.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Oglala Lakota County by age, ACS 2020–2024
Age	People	Share	South Dakota	United States
Under 5	1,192 ±65	8.8% ±0.5	6.3% ±0.1	5.6% ±<0.1
5 to 17	3,585 ±290	26.6% ±2.2	17.9% ±0.2	16.3% ±<0.1
18 to 24	1,586 ±398	11.8% ±2.9	9.3% ±0.4	9.1% ±<0.1
25 to 44	3,569 ±306	26.5% ±2.3	25.2% ±0.2	26.9% ±<0.1
45 to 64	2,546 ±357	18.9% ±2.6	23.3% ±0.2	24.8% ±<0.1
65 and over	1,013 ±238	7.5% ±1.8	18.0% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $41,417 ±$14,548, and income per person $11,771 ±$1,892, 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 Oglala Lakota County by income, ACS 2020–2024
Household income	Households	Share	South Dakota	United States
Under $25,000	1,081 ±273	37.0% ±8.9	14.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	512 ±202	17.5% ±6.8	18.5% ±0.5	16.7% ±<0.1
$50,000 to $74,999	555 ±169	19.0% ±5.6	17.4% ±0.4	15.5% ±<0.1
$75,000 to $99,999	218 to 694	7.5% to 23.7%	14.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	50 to 278	1.7% to 9.5%	18.9% ±0.5	17.5% ±<0.1
$150,000 to $199,999	4 to 120	0.1% to 4.1%	8.5% ±0.3	9.6% ±<0.1
$200,000 or more	0 to 200	0% to 6.8%	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 Oglala Lakota County by age, ACS 2020–2024
Age	Below poverty	Rate	South Dakota	United States
All ages	7,579 ±1,048	57.6% ±7.7	11.9% ±0.4	12.5% ±0.1
Under 18	2,849 ±433	60.1% ±5.2	14.3% ±0.6	16.1% ±0.1
18 to 59	3,981 ±624	60.0% ±5.5	11.8% ±0.5	11.6% ±0.1
60 and over	749 ±180	41.9% ±5.7	9.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Oglala Lakota County, ACS 2020–2024
Measure	Oglala Lakota County	South Dakota	United States
Housing units	3,470 ±95	408,584 ±422	143,775,355 ±10,234
Occupied	84.2% ±5.7	89.5% ±0.4	89.9% ±0.1
Vacant	15.8% ±5.1	10.5% ±0.4	10.1% ±0.1
Owner occupied	51.5% ±6.8	68.6% ±0.5	65.2% ±0.3
Renter occupied	48.5% ±8.5	31.4% ±0.5	34.8% ±0.1
Median home value	$52,900 ±$7,539	$257,400 ±$3,051	$332,700 ±$236
Median gross rent	$584 ±$73	$946 ±$11	$1,413 ±$2
Median year built	1987 ±5	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 Oglala Lakota County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Dakota	United States
Hispanic or Latino	94 to 424	0.7% to 3.1%	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	950 ±3	7.0% ±<0.1	79.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 26	0% to 0.2%	2.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 16	0% to 0.1%	1.4% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	12,248 ±179	90.8% ±1.3	7.1% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 16	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 16	0% to 0.1%	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	0 to 104	0% to 0.8%	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 Oglala Lakota County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Dakota	United States
Born in the state	12,205 ±342	90.5% ±2.5	62.4% ±0.4	57.3% ±<0.1
Born in another state	1,189 ±361	8.8% ±2.7	32.9% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 153	0% to 1.1%	0.7% ±0.1	1.7% ±<0.1
Born abroad	0 to 57	0% to 0.4%	4.0% ±0.2	14.1% ±<0.1
Naturalized citizens	0 to 57	0% to 0.4%	1.7% ±0.1	7.4% ±<0.1
Not citizens	0 to 16	0% to 0.1%	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%.

Oglala Lakota County among the counties of South Dakota

15th of 66 by population, July 2025. Every one is listed on the South Dakota page.

Counties of South Dakota near Oglala Lakota County in population, July 2025
County	July 2025	Change since 2020
Davison County	20,069	+0.5%
Beadle County	19,624	+2.4%
Hughes County	17,570	−0.9%
Union County	17,402	+3.2%
Clay County	15,031	+0.2%
Oglala Lakota County	13,338	−2.3%
Lake County	10,993	−0.2%
Butte County	10,856	+5.5%
Roberts County	10,255	−0.1%
Custer County	9,431	+13.2%
Turner County	9,314	+7.3%

Elsewhere on the site

Rankings this appears in

No. 1 Counties by poverty rate
No. 1 Counties in South Dakota by poverty rate
No. 15 Counties by population in South Dakota
No. 35 Counties in South Dakota by median rent
No. 47 Counties in South Dakota by median household income
No. 57 Counties by population growth in South Dakota

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

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026