Demographics of Walworth County, South Dakota

Walworth County, South Dakota had 5,217 people on July 1, 2025, by the Census Bureau’s estimate: −74 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.

Walworth County, in four figures

5,217
Population: July 1, 2025, Vintage 2025 estimate.; −1.4%
Change since July 2020: −74 people.; 41.7 ±1.4
Median age: ACS 2020–⁠2024.; $65,026 ±$10,908
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.

Walworth County, South Dakota's population shrank 1.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Walworth 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

Walworth County, South Dakota's population shrank 1.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Walworth 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	5,291	100.0	100.0
2021	5,255	99.3	100.2
2022	5,259	99.4	100.7
2023	5,256	99.3	101.6
2024	5,244	99.1	102.5
2025	5,217	98.6	103.1

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Population of Walworth 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	5,291	−26	−1	0	−22
2021	5,255	−36	−13	+2	−28
2022	5,259	+4	−19	−2	+29
2023	5,256	−3	+21	0	−26
2024	5,244	−12	+10	0	−21
2025	5,217	−27	+5	−1	−31

Age, 2020–2024

The median age is 41.7 ±1.4: for men 39.0 ±1.2 and for women 43.8 ±1.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Walworth County by age, ACS 2020–2024
Age	People	Share	South Dakota	United States
Under 5	359 ±74	6.8% ±1.4	6.3% ±0.1	5.6% ±<0.1
5 to 17	891 ±137	16.9% ±2.6	17.9% ±0.2	16.3% ±<0.1
18 to 24	222 ±105	4.2% ±2.0	9.3% ±0.4	9.1% ±<0.1
25 to 44	1,395 ±194	26.5% ±3.7	25.2% ±0.2	26.9% ±<0.1
45 to 64	1,192 ±142	22.6% ±2.7	23.3% ±0.2	24.8% ±<0.1
65 and over	1,212 ±135	23.0% ±2.6	18.0% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $65,026 ±$10,908, and income per person $38,408 ±$4,328, 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 Walworth County by income, ACS 2020–2024
Household income	Households	Share	South Dakota	United States
Under $25,000	405 ±116	16.8% ±4.7	14.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	514 ±141	21.3% ±5.7	18.5% ±0.5	16.7% ±<0.1
$50,000 to $74,999	492 ±138	20.4% ±5.6	17.4% ±0.4	15.5% ±<0.1
$75,000 to $99,999	326 ±111	13.5% ±4.5	14.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	453 ±138	18.8% ±5.6	18.9% ±0.5	17.5% ±<0.1
$150,000 to $199,999	49 to 163	2.0% to 6.7%	8.5% ±0.3	9.6% ±<0.1
$200,000 or more	58 to 180	2.4% to 7.4%	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 Walworth County by age, ACS 2020–2024
Age	Below poverty	Rate	South Dakota	United States
All ages	768 ±258	14.9% ±5.0	11.9% ±0.4	12.5% ±0.1
Under 18	316 ±125	25.3% ±9.2	14.3% ±0.6	16.1% ±0.1
18 to 59	297 ±115	12.9% ±4.9	11.8% ±0.5	11.6% ±0.1
60 and over	155 ±58	9.7% ±3.6	9.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Walworth County, ACS 2020–2024
Measure	Walworth County	South Dakota	United States
Housing units	2,932 ±39	408,584 ±422	143,775,355 ±10,234
Occupied	82.4% ±4.1	89.5% ±0.4	89.9% ±0.1
Vacant	17.6% ±4.6	10.5% ±0.4	10.1% ±0.1
Owner occupied	76.2% ±3.5	68.6% ±0.5	65.2% ±0.3
Renter occupied	23.8% ±5.0	31.4% ±0.5	34.8% ±0.1
Median home value	$136,600 ±$25,815	$257,400 ±$3,051	$332,700 ±$236
Median gross rent	$926 ±$158	$946 ±$11	$1,413 ±$2
Median year built	1969 ±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 Walworth County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Dakota	United States
Hispanic or Latino	0 to 67	0% to 1.3%	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	4,120 ±13	78.2% ±0.2	79.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 50	0% to 0.9%	2.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 68	0% to 1.3%	1.4% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	561 ±223	10.6% ±4.2	7.1% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 15	0% to 0.3%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	2 to 22	< 0.1% to 0.4%	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	499 ±238	9.5% ±4.5	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 Walworth County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Dakota	United States
Born in the state	3,426 ±234	65.0% ±4.4	62.4% ±0.4	57.3% ±<0.1
Born in another state	1,799 ±243	34.1% ±4.6	32.9% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 60	0% to 1.1%	0.7% ±0.1	1.7% ±<0.1
Born abroad	4 to 38	0.1% to 0.7%	4.0% ±0.2	14.1% ±<0.1
Naturalized citizens	0 to 22	0% to 0.4%	1.7% ±0.1	7.4% ±<0.1
Not citizens	0 to 22	0% to 0.4%	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%.

Walworth County among the counties of South Dakota

36th of 66 by population, July 2025. Every one is listed on the South Dakota page.

Counties of South Dakota near Walworth County in population, July 2025
County	July 2025	Change since 2020
Tripp County	5,708	+1.8%
Day County	5,484	+0.8%
Dewey County	5,419	+3.8%
Kingsbury County	5,284	+1.6%
Brule County	5,278	+0.5%
Walworth County	5,217	−1.4%
Marshall County	4,426	+2.9%
Deuel County	4,408	+2.6%
Gregory County	4,037	+1.1%
Clark County	4,031	+4.7%
Edmunds County	4,022	+1.0%

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