Unified School District · SD
Spearfish School District 40-2
Spearfish School District 40-2 is a unified school district in South Dakota with a community population of 18,116. The median household income is $73,979 and the median age is 40.7.
18,116
Population
64
People / sq mi
$73,979
Median Income
40.7
Median Age
Spearfish School District 40-2 covers 283 sq mi of land at 64.0 people per square mile.
Race & Ethnicity
| White | 89.3% |
| Black or African American | 0.0% |
| Asian | 61.2% |
| Hispanic or Latino (any race) | 0.1% |
Economy & Income
$73,979
Median Household Income
$47,039
Per Capita Income
10.7%
Poverty Rate
1.2%
Unemployment
Housing
$370,400
Median Home Value
$965
Median Rent
59.6%
Homeownership
Education Attainment
95.8%
High School+
37.9%
Bachelor's+
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State rankings
Frequently Asked Questions
Spearfish School District 40-2 serves a community with a population of 18,116 according to the latest Census ACS 5-Year estimates. This unified school district is located in South Dakota.
The median household income in Spearfish School District 40-2 is $73,979, with a per capita income of $47,039. The poverty rate is 10.7%.
Spearfish School District 40-2 is 89.3% White, 0.0% Black or African American, 61.2% Asian, and 0.1% Hispanic or Latino, per Census ACS data.
In Spearfish School District 40-2, 95.8% of adults have a high school diploma or higher, and 37.9% hold a bachelor's degree or higher, per Census ACS estimates.
The median home value in Spearfish School District 40-2 is $370,400, with a median rent of $965. The homeownership rate is 59.6%.
More from South Dakota
Data for Spearfish School District 40-2 from the American Community Survey 5-Year estimates. Land area from Census Gazetteer files. This is a unified school district (GEOID: 4666930).
The this entity record above pulls directly from the U.S. Census Bureau ACS and decennial files. What follows is the per-entity context — how this entity sits in the broader U.S. population demographics distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the the U.S. Census Bureau ACS and decennial files portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. states, metros, cities, and ZIPs. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: U.S. Census Bureau ACS, 2026.