Spearfish, South Dakota Population 2020

12,084

Spearfish is a city located in South Dakota. With a 2020 population of 12,084, it is the 10th largest city in South Dakota and the 2712th largest city in the United States. Spearfish is currently growing at a rate of 1.67% annually and its population has increased by 15.15% since the most recent census, which recorded a population of 10,494 in 2010. Spanning over 16 miles, Spearfish has a population density of 734 people per square mile.

The average household income in Spearfish is $71,253 with a poverty rate of 12.78%. The median rental costs in recent years comes to $724 per month, and the median house value is $211,100. The median age in Spearfish is 35.8 years, 35 years for males, and 37.9 years for females. For every 100 females there are 91.9 males.

Spearfish Demographics

According to the most recent ACS, the racial composition of Spearfish was:

  • White: 94.00%
  • Native American: 2.51%
  • Two or more races: 1.55%
  • Asian: 1.22%
  • Black or African American: 0.60%
  • Native Hawaiian or Pacific Islander: 0.12%
  • Other race: 0.00%
The current population of Spearfish, South Dakota is 12,084, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 11,688.The last official US Census in 2010 recorded the population at 10,494.

Spearfish, South Dakota Population 2020

Year Total Population Growth Annual Growth Rate
202026,0111350.52%
201925,8761350.52%
201825,7411350.52%
201725,6063351.31%
201625,2714461.76%
201524,825960.39%
201424,729-208-0.84%
201324,9375372.15%
201224,400740.30%
201124,3261210.50%
201024,2050.00%

Population by Race

Race Population Percentage
White10,70994.00%
American Indian and Alaska Native2862.51%
Two or More Races1771.55%
Asian1391.22%
Black or African American680.60%
Native Hawaiian and Other Pacific Islander140.12%

Spearfish Population Pyramid 2020

Spearfish Median Age

35.8


Total

35


Male

37.9


Female

Spearfish Adults

There are 9,393 adults, (2,215 of whom are seniors) in Spearfish.

Spearfish Age Dependency

58.7

Age Dependency Ratio

30.9

Old Age Dependency Ratio

27.9

Child Dependency Ratio

Spearfish Sex Ratio

Female

5,937

52.11%

Male

5,456

47.89%

Spearfish Households and Families

Spearfish Renter vs Owner Occupied by Household Type

Spearfish Household Types

Type Owner Renter
Married78.3%21.7%
All53.9%46.1%
Female48.8%51.2%
Male48.4%51.6%
Non Family34.8%65.2%

53.9%

Rate of Home Ownership

Type Count Average Size Owned
All4,9472.1253.9
Non Family2,4231.3534.8
Married2,0132.878.3
Female3833.2248.8
Male1282.748.4

2.77

Average Family Size

2.12

Average Household Size

7.9%

Unmarried (Opposite Sex)

0%

Unmarried (Same Sex)

Spearfish Education

Education Attained Count Percentage
Less Than 9th Grade1441.96%
9th to 12th Grade1902.58%
High School Graduate2,04027.72%
Some College1,53820.90%
Associates Degree6508.83%
Bachelors Degree1,84725.10%
Graduate Degree94912.90%

Spearfish Educational Attainment by Race

Name Total High School Bachelors
White7,0346,7192,619
Hispanic12912966
Asian818162
Native American686813
Multiple Races626251
Black19

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among multiple races people with a rate of 82.26%.

Name Average Male Female
Overall$33,720$42,863$28,401
Less Than High School$$$28,750
High School Grad$30,266$39,750$21,449
Some College$34,464$45,074$25,665
Bachelors Degree$31,486$36,786$29,940
Graduate Degree$52,364$50,968$61,375

$33,720

Average Earnings

$42,863

Average Male

$28,401

Average Female

Spearfish Language

Spearfish Language by Age

Spearfish Language

97.30% of Spearfish residents speak only English, while 2.70% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 0.99% of the population.

Spearfish Poverty

Spearfish Poverty by Race

Name Total In Poverty Poverty Rate
White9,7971,15411.78%
Native2257432.89%
Multiple1495838.93%
Hispanic2443915.98%
Asian982222.45%
Black461021.74%

12.78%

Overall Poverty Rate

11.11%

Male Poverty Rate

14.40%

Female Poverty Rate

Poverty in Spearfish

The race most likely to be in poverty in Spearfish is Multiple, with 38.93% below the poverty level.

The race least likely to be in poverty in Spearfish is White, with 11.78% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.55%. Among those working part-time, it was 26.27%, and for those that did not work, the poverty rate was 15.22%.

Name Poverty
Some College9.32%
High School8.09%
Less Than High School6.95%
Bachelors or Greater6.14%
Name Poverty
Female Unemployed40.63%
Female Employed11.76%
Male Employed5.30%
Male Unemployed0.00%

Spearfish Income

Spearfish Income by Household Type

Name Median Mean
Households$47,466$71,253
Families$76,437$99,484
Married Families$82,566-
Non Families$26,991$39,236

Spearfish Marital Status

Spearfish Marital Status

Marriage Rates

42.9%

Overall Marriage Rate

45.2%

Male Marriage Rate

40.9%

Female Marriage Rate

Spearfish Married by Age and Sex

Spearfish Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Spearfish Marital Status by Race

Spearfish Veterans

846

Number of Veterans

766

Male Veterans

80

Female Veterans

War Veterans
Vietnam303
First Gulf War168
Korea167
Second Gulf War65
World War II23

$Spearfish Veterans by Education

7.66%

Veteran Poverty Rate

42.40%

Veteran Disability Rate

Spearfish Employment Status

64.9%

Labor Force Participation

63.1%

Employment Rate

1.8%

Unemployment Rate

Spearfish Place of Birth

Origin of Non-Citizens

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

54.45%

Born in South Dakota

97.35%

Native Born

2.65%

Foreign Born

1.72%

Non Citizen

Place of Birth

97.35% of Spearfish residents were born in the United States, with 54.45% having been born in South Dakota. 1.72% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Year Population Growth Annual Growth Rate
202012,0841981.67%
201911,8861981.69%
201811,688580.50%
201711,6301981.73%
201611,4322362.11%
201511,1961521.38%
201411,044110.10%
201311,0333453.23%
201210,688620.58%
201110,626930.88%
201010,5331,9272.04%
20008,6061,6402.14%
19906,9661,7152.87%
19805,2515901.20%
19704,6619792.39%
19603,6829292.95%
19502,7530.00%