Demographics of Hamlin County, South Dakota

Hamlin County, South Dakota had 6,900 people on July 1, 2025, by the Census Bureau’s estimate: +731 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.

Hamlin County, in four figures

6,900
Population: July 1, 2025, Vintage 2025 estimate.; +11.8%
Change since July 2020: +731 people.; 31.8 ±0.5
Median age: ACS 2020–⁠2024.; $87,101 ±$2,886
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.

Hamlin County, South Dakota's population grew 11.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Hamlin 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

Hamlin County, South Dakota's population grew 11.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Hamlin 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	6,169	100.0	100.0
2021	6,264	101.5	100.2
2022	6,413	104.0	100.7
2023	6,479	105.0	101.6
2024	6,730	109.1	102.5
2025	6,900	111.8	103.1

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Population of Hamlin 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	6,169	−2	+14	0	−15
2021	6,264	+95	+43	+6	+45
2022	6,413	+149	+94	+42	+15
2023	6,479	+66	+94	+26	−56
2024	6,730	+251	+92	+124	+34
2025	6,900	+170	+84	+95	−10

Age, 2020–2024

The median age is 31.8 ±0.5: for men 32.2 ±0.7 and for women 31.4 ±0.8. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Hamlin County by age, ACS 2020–2024
Age	People	Share	South Dakota	United States
Under 5	643 ±18	10.1% ±0.3	6.3% ±0.1	5.6% ±<0.1
5 to 17	1,468 ±93	23.0% ±1.5	17.9% ±0.2	16.3% ±<0.1
18 to 24	576 ±74	9.0% ±1.2	9.3% ±0.4	9.1% ±<0.1
25 to 44	1,440 ±86	22.6% ±1.3	25.2% ±0.2	26.9% ±<0.1
45 to 64	1,335 ±96	20.9% ±1.5	23.3% ±0.2	24.8% ±<0.1
65 and over	911 ±98	14.3% ±1.5	18.0% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $87,101 ±$2,886, and income per person $39,106 ±$4,091, 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 Hamlin County by income, ACS 2020–2024
Household income	Households	Share	South Dakota	United States
Under $25,000	136 ±40	6.2% ±1.8	14.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	405 ±83	18.5% ±3.7	18.5% ±0.5	16.7% ±<0.1
$50,000 to $74,999	343 ±64	15.6% ±2.8	17.4% ±0.4	15.5% ±<0.1
$75,000 to $99,999	449 ±77	20.5% ±3.4	14.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	542 ±83	24.7% ±3.6	18.9% ±0.5	17.5% ±<0.1
$150,000 to $199,999	146 ±38	6.7% ±1.7	8.5% ±0.3	9.6% ±<0.1
$200,000 or more	173 ±42	7.9% ±1.9	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 Hamlin County by age, ACS 2020–2024
Age	Below poverty	Rate	South Dakota	United States
All ages	425 ±178	6.9% ±2.9	11.9% ±0.4	12.5% ±0.1
Under 18	200 ±89	9.5% ±4.2	14.3% ±0.6	16.1% ±0.1
18 to 59	183 ±65	6.2% ±2.2	11.8% ±0.5	11.6% ±0.1
60 and over	42 ±20	3.8% ±1.7	9.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Hamlin County, ACS 2020–2024
Measure	Hamlin County	South Dakota	United States
Housing units	2,860 ±26	408,584 ±422	143,775,355 ±10,234
Occupied	76.7% ±3.7	89.5% ±0.4	89.9% ±0.1
Vacant	23.3% ±3.8	10.5% ±0.4	10.1% ±0.1
Owner occupied	82.0% ±5.5	68.6% ±0.5	65.2% ±0.3
Renter occupied	18.0% ±3.3	31.4% ±0.5	34.8% ±0.1
Median home value	$208,600 ±$16,083	$257,400 ±$3,051	$332,700 ±$236
Median gross rent	$800 ±$212	$946 ±$11	$1,413 ±$2
Median year built	1969 ±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 Hamlin County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Dakota	United States
Hispanic or Latino	375 ±0	5.9% ±<0.1	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	5,810 ±28	91.2% ±0.4	79.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	1 to 17	< 0.1% to 0.3%	2.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 34	0% to 0.5%	1.4% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 27	0% to 0.4%	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 23	0% to 0.4%	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	141 ±33	2.2% ±0.5	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 Hamlin County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Dakota	United States
Born in the state	4,539 ±183	71.2% ±2.9	62.4% ±0.4	57.3% ±<0.1
Born in another state	1,554 ±187	24.4% ±2.9	32.9% ±0.4	26.9% ±<0.1
Born a citizen outside the states	4 to 58	0.1% to 0.9%	0.7% ±0.1	1.7% ±<0.1
Born abroad	249 ±46	3.9% ±0.7	4.0% ±0.2	14.1% ±<0.1
Naturalized citizens	9 to 51	0.1% to 0.8%	1.7% ±0.1	7.4% ±<0.1
Not citizens	219 ±44	3.4% ±0.7	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%.

Hamlin County among the counties of South Dakota

27th of 66 by population, July 2025. Every one is listed on the South Dakota page.

Counties of South Dakota near Hamlin County in population, July 2025
County	July 2025	Change since 2020
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%
Spink County	6,155	−3.0%
McCook County	5,964	+5.2%
Tripp County	5,708	+1.8%
Day County	5,484	+0.8%

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