Spearfish, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Spearfish, South Dakota is 12,551 as of the 2023 American Community Survey, making it the 10th-largest city in South Dakota. The median household income is $59,731, the median home value is $309,200, and the median age is 37.2.
The population has grown 31.2% since 2010 (10,523 → 13,803).
12,551
Population
727
People / sq mi
$59,731
Median Income
$309,200
Median Home Value
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Spearfish covers 17.3 sq mi of land at 727 people per square mile.
About Spearfish, SD
Spearfish stands apart on settlement density — it is among the most sparsely settled of US cities, at roughly 727 people per square mile. With 12,551 residents, Spearfish is a city in South Dakota. It is the #10-largest of all cities in South Dakota nationally.
Earnings trail the nation, with the median household making $59,731, below the US median of $78,538. The poverty rate is 7.7%, below the national 12.4%. The typical home is valued at $309,200, with typical rent around $941.
About 43.6% of adults 25 and older have a bachelor’s degree, above the 35.0% national figure. Just 5.5% of workers are home-based, below the national 14.0%, and the average commute runs about 15 minutes each way.
Spearfish city Population History (2010-2024)
The city of Spearfish city had a population of 10,523 in 2010 and 13,803 in 2024, a 31.2% growth over 14 years. The peak was 13,803 in 2024. Average annual growth rate: 1.97%.
13,803
Population (2024)
10,523
Population (2010)
13,803
Peak (2024)
1.97%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 10,523 |
| 2011 | 10,617 |
| 2012 | 10,679 |
| 2013 | 11,024 |
| 2014 | 11,031 |
| 2015 | 11,181 |
| 2016 | 11,438 |
| 2017 | 11,646 |
| 2018 | 11,667 |
| 2019 | 11,756 |
| 2020 | 12,225 |
| 2021 | 12,369 |
| 2022 | 12,926 |
| 2023 | 13,314 |
| 2024 | 13,803 |
Race & Ethnicity
| White | 87.8% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 5.3% |
| Two or More Races | 0.2% |
Economy & Income
$59,731
Median Household Income
$43,516
Per Capita Income
7.7%
Poverty Rate
1.6%
Unemployment Rate
Housing
$309,200
Median Home Value
$941
Median Rent
48.3%
Owner-Occupied
Education
95.9%
High School+
43.6%
Bachelor's+
Commute
1.4%
Drive Alone
80.6%
Public Transit
5.5%
Work From Home
14.8 min
Avg Commute
Community Profile
42.7%
Foreign Born
96.0%
Non-English at Home
10.5%
Veterans
17.7%
With Disability
90.7%
Health Insurance
94.3%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 25.7% |
| Education, Health Care & Social Services | 21.9% |
| Finance, Insurance & Real Estate | 6.7% |
| Agriculture & Mining | 5.9% |
| Arts, Entertainment & Food Services | 5.7% |
| Manufacturing | 5.1% |
| Information | 4.5% |
| Construction | 3.2% |
| Retail Trade | 2.5% |
| Public Administration | 2.4% |
| Transportation & Warehousing | 1.8% |
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Frequently Asked Questions
Spearfish, South Dakota has a population of 12,551 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 10th-largest city in South Dakota.
The median household income in Spearfish, South Dakota is $59,731, with 7.7% of residents living below the federal poverty level.
The median home value in Spearfish, South Dakota is $309,200, with median monthly rent at $941 and a homeownership rate of 48.3%.
The median age in Spearfish, South Dakota is 37.2 years. The population is 48.5% male and 51.5% female.
The population has grown 31.2% since 2010 (10,523 → 13,803).
Spearfish city, SD Climate
Spearfish city, SD has an average annual temperature of 7.4°C (45°F) and receives about 602 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
7.4°C
Avg Temp
602
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -5° / 24° | 20 mm |
| February | -3° / 27° | 24 mm |
| March | 1° / 33° | 42 mm |
| April | 6° / 43° | 74 mm |
| May | 12° / 53° | 101 mm |
| June | 17° / 63° | 101 mm |
| July | 21° / 69° | 54 mm |
| August | 20° / 68° | 49 mm |
| September | 15° / 58° | 45 mm |
| October | 8° / 46° | 41 mm |
| November | 1° / 33° | 25 mm |
| December | -3° / 26° | 26 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Spearfish city, SD
The most comfortable months to visit Spearfish city, SD are typically July, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 28°C high). The coldest is January (near -11°C low). May is usually the wettest month.
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Statewide data for South Dakota
Population, race, income, age, and trends across South Dakota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.