Demographics of Spearfish city, South Dakota

Spearfish city, South Dakota had 14,154 people on July 1, 2025, by the Census Bureau’s estimate: +1,915 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Spearfish city, in four figures

14,154
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 12,930 ±28.; +15.6%
Change since July 2020: +1,915 people.; 40.0 ±1.9
Median age: ACS 2020–⁠2024.; $65,688 ±$12,528
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Spearfish city, South Dakota's population grew 15.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Spearfish city, 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 — incorporated places and New England towns

About this chart

The figures

Spearfish city, South Dakota's population grew 15.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Spearfish city, 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	12,239	100.0	100.0
2021	12,386	101.2	100.2
2022	12,944	105.8	100.7
2023	13,311	108.8	101.6
2024	13,789	112.7	102.5
2025	14,154	115.6	103.1

Population of Spearfish city, South Dakota on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	12,239	—
2021	12,386	+147
2022	12,944	+558
2023	13,311	+367
2024	13,789	+478
2025	14,154	+365

Age, 2020–2024

The median age is 40.0 ±1.9: for men 40.2 ±2.1 and for women 39.4 ±2.8. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Spearfish city by age, ACS 2020–2024
Age	People	Share	South Dakota	United States
Under 5	718 ±142	5.6% ±1.1	6.3% ±0.1	5.6% ±<0.1
5 to 17	1,658 ±278	12.8% ±2.1	17.9% ±0.2	16.3% ±<0.1
18 to 24	1,831 ±394	14.2% ±3.1	9.3% ±0.4	9.1% ±<0.1
25 to 44	3,157 ±417	24.4% ±3.2	25.2% ±0.2	26.9% ±<0.1
45 to 64	2,890 ±332	22.4% ±2.6	23.3% ±0.2	24.8% ±<0.1
65 and over	2,676 ±370	20.7% ±2.9	18.0% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $65,688 ±$12,528, and income per person $45,171 ±$6,252, 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 Spearfish city by income, ACS 2020–2024
Household income	Households	Share	South Dakota	United States
Under $25,000	1,081 ±281	18.2% ±4.7	14.0% ±0.4	14.6% ±<0.1
$25,000 to $49,999	1,306 ±337	22.0% ±5.6	18.5% ±0.5	16.7% ±<0.1
$50,000 to $74,999	821 ±220	13.8% ±3.7	17.4% ±0.4	15.5% ±<0.1
$75,000 to $99,999	997 ±283	16.8% ±4.7	14.6% ±0.4	12.6% ±<0.1
$100,000 to $149,999	979 ±253	16.5% ±4.2	18.9% ±0.5	17.5% ±<0.1
$150,000 to $199,999	314 ±137	5.3% ±2.3	8.5% ±0.3	9.6% ±<0.1
$200,000 or more	434 ±174	7.3% ±2.9	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 Spearfish city by age, ACS 2020–2024
Age	Below poverty	Rate	South Dakota	United States
All ages	1,859 ±499	15.2% ±4.1	11.9% ±0.4	12.5% ±0.1
Under 18	317 ±143	13.4% ±5.8	14.3% ±0.6	16.1% ±0.1
18 to 59	1,172 ±418	18.4% ±6.3	11.8% ±0.5	11.6% ±0.1
60 and over	370 ±142	10.6% ±3.9	9.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Spearfish city, ACS 2020–2024
Measure	Spearfish city	South Dakota	United States
Housing units	6,494 ±263	408,584 ±422	143,775,355 ±10,234
Occupied	91.3% ±1.1	89.5% ±0.4	89.9% ±0.1
Vacant	8.7% ±3.2	10.5% ±0.4	10.1% ±0.1
Owner occupied	49.6% ±2.8	68.6% ±0.5	65.2% ±0.3
Renter occupied	50.4% ±5.0	31.4% ±0.5	34.8% ±0.1
Median home value	$346,200 ±$21,481	$257,400 ±$3,051	$332,700 ±$236
Median gross rent	$963 ±$97	$946 ±$11	$1,413 ±$2
Median year built	1992 ±4	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 Spearfish city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Dakota	United States
Hispanic or Latino	500 ±157	3.9% ±1.2	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	11,290 ±293	87.3% ±2.3	79.8% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 54	0% to 0.4%	2.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 160	0% to 1.2%	1.4% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	447 ±155	3.5% ±1.2	7.1% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 57	0% to 0.4%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 93	0% to 0.7%	0.3% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	530 ±195	4.1% ±1.5	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 Spearfish city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Dakota	United States
Born in the state	6,925 ±564	53.6% ±4.4	62.4% ±0.4	57.3% ±<0.1
Born in another state	5,636 ±566	43.6% ±4.4	32.9% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 71	0% to 0.5%	0.7% ±0.1	1.7% ±<0.1
Born abroad	340 ±163	2.6% ±1.3	4.0% ±0.2	14.1% ±<0.1
Naturalized citizens	82 to 362	0.6% to 2.8%	1.7% ±0.1	7.4% ±<0.1
Not citizens	48 to 188	0.4% to 1.5%	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%.

Spearfish city among the places of South Dakota

10th of 19 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the South Dakota page.

Places of South Dakota near Spearfish city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Watertown city	23,044 ±23
Mitchell city	15,649 ±48
Yankton city	15,540 ±39
Huron city	14,385 ±34
Pierre city	13,948 ±24
Spearfish city	12,930 ±28
Box Elder city	12,902 ±55
Vermillion city	11,878 ±23
Brandon city	10,996 ±30
Harrisburg city	8,519 ±18
Sturgis city	7,086 ±30

Sources

Census Bureau population estimates — incorporated places and New England towns — 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