Spearfish demographics profile

StatisticSpearfishSouth DakotaNational
Population density (sq mi)6791191
Median age31.836.837.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)52%59%55%
Families w/ Kids under 1848%44%43%
Speak English97%94%79%
Speak Spanish1%2%13%
Spearfish, SD has a population of 11,176 and is the 3,619th largest city in the United States. The population density is 679 per sq mi which is 6181% higher than the South Dakota average and 649% higher than the national average. The median age in Spearfish is 32 which is approximately 14% lower than the South Dakota average of 37. In Spearfish, 52% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 56% of Spearfish residents were born in South Dakota, 40% were born out of state, 1% were born outside of the United States and 3% were foreign born.

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Did you know?

  • The population density in Spearfish is 6181% higher than South Dakota.
  • The median age in Spearfish is 14% lower than South Dakota.
  • In Spearfish 93.11% of the population is White.
  • In Spearfish 1.02% of the population is Black or African American.
  • In Spearfish 0.95% of the population is Asian.

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Spearfish population breakdown by race

RaceSpearfishSouth DakotaNational
Black or African American1.02%1.65%12.63%
American Indian3.10%8.72%0.82%
Native Hawaiian0.10%0.04%0.18%
Mixed race0.93%2.61%3.06%
Other race0.80%0.88%4.75%
In Spearfish, 2.7% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Spearfish age breakdown

Marital status

Age of children in married couples

Source: The Spearfish, SD demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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