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Mountain Plains, SD

350 Population
1.6 square miles 219.5 people per square mile

Census data: ACS 2024 5-year unless noted

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Demographics

63.4 ±4.6 Median age
  • about 1.4 times the figure in the Spearfish, SD Micro Area: 44.8 ±0.5
  • more than 1.5 times the figure in South Dakota: 38 ±0.2
  • more than 1.5 times the figure in United States: 38.9 ±0.1

Economics

$162,437 ±$79,227 Per capita income
  • more than double the amount in the Spearfish, SD Micro Area: $44,386 ±$3,489
  • more than double the amount in South Dakota: $40,550 ±$520
  • more than double the amount in United States: $44,673 ±$122
$248,558 ±$207,827 Median household income
  • more than double the amount in the Spearfish, SD Micro Area: $73,384 ±$4,448
  • more than double the amount in South Dakota: $75,081 ±$888
  • more than double the amount in United States: $80,734 ±$166

N/A Persons below poverty line

15.5 minutes ±15.7 (2,720  ±1,794) Mean travel time to work
  • about 80 percent of the figure in the Spearfish, SD Micro Area: 19.1 257,290 (±1.5 / ±22,590)
  • about 90 percent of the figure in South Dakota: 17.8 7,339,145 (±0.2 / ±101,823)
  • about three-fifths of the figure in United States: 26.4 3,569,606,700 (±0 / ±5,719,373)

Families

150 ±75 Number of households
  • the Spearfish, SD Micro Area: 12,054 ±374
  • South Dakota: 365,544 ±1,728
  • United States: 129,227,496 ±209,365
2.3 ±1.6 (350  ±153) Persons per household
  • about 10 percent higher than the figure in the Spearfish, SD Micro Area: 2.2 26,304 (±0.1 / ±38)
  • a little less than the figure in South Dakota: 2.4 875,241
  • about 90 percent of the figure in United States: 2.5 326,722,430

N/A Women 15-50 who gave birth during past year

Housing

150 ±75 Number of housing units
  • the Spearfish, SD Micro Area: 14,840 ±40
  • South Dakota: 408,584 ±422
  • United States: 143,775,360 ±10,234

$613,200 ±$52,638 Median value of owner-occupied housing units
  • more than 1.5 times the amount in the Spearfish, SD Micro Area: $346,500 ±$16,964
  • more than double the amount in South Dakota: $257,400 ±$3,051
  • nearly double the amount in United States: $332,700 ±$236

19.7% ±20.1% (69  ±76.4) Moved since previous year
  • about 1.5 times the rate in the Spearfish, SD Micro Area: 13.2% † 3,564 (±2.3% / ±631.3)
  • about 1.5 times the rate in South Dakota: 13% 116,449 (±0.4% / ±3,890.1)
  • about 1.5 times the rate in United States: 12.3% 40,747,183 (±0% / ±136,530.8)

Social

100% ±58.6% (318  ±121.8) High school grad or higher
  • a little higher than the rate in the Spearfish, SD Micro Area: 95.4% 18,927 (±5.1% / ±1,013.2)
  • about 10 percent higher than the rate in South Dakota: 93.2% 562,448 (±0.9% / ±5,163.6)
  • about 10 percent higher than the rate in United States: 89.6% 206,814,894 (±0.1% / ±283,951.7)
43.1% ±15.2% (137  ±77.7) Bachelor's degree or higher
  • about 1.3 times the rate in the Spearfish, SD Micro Area: 32.9% 6,533 (±3.1% / ±609.8)
  • about 1.4 times the rate in South Dakota: 31.9% 192,610 (±0.5% / ±3,182.5)
  • about 20 percent higher than the rate in United States: 35.7% 82,363,217 (±0.1% / ±182,857.7)

N/A Persons with language other than English spoken at home

7.4% ±10.7% (26  ±39) Foreign-born population
  • more than double the rate in the Spearfish, SD Micro Area: 2% 555
  • nearly double the rate in South Dakota: 4% 35,988
  • about half the rate in United States: 14.1% 47,349,080

8.6% ±9.3% (30  ±35) Population with veteran status
  • about 80 percent of the rate in the Spearfish, SD Micro Area: 10.4% † 2,366 (±1.6% / ±374)
  • about 10 percent higher than the rate in South Dakota: 7.9% 53,890 (±0.3% / ±1,825)
  • about 1.4 times the rate in United States: 6.2% 16,185,883 (±0% / ±45,251)
30 Total veterans ±35 30 Male ±35 N/A Female ±10

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