Mountain Plains Flag

Mountain Plains

County:
Butte County
County Seat:
No
Area (mi²):
1.595
State:
South Dakota

Mountain Plains is a CDP located in Butte County, South Dakota. Mountain Plains has a 2026 population of 507. Mountain Plains is currently growing at a rate of 6.74% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median household income in Mountain Plains is $248,558 with a poverty rate of 0%. The median age in Mountain Plains is 63.4 years: 63.6 years for males, and 60.7 years for females. For every 100 females there are 105.9 males.

507
Total Population
318
Density (mi²)
32 6.74%
Growth

Mountain Plains Population

Mountain Plains Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026507326.74%
2025475316.98%

Median Age

Overall: 63.4 years
Female: 60.7 years
Male: 63.6 years

Mountain Plains Adults

There are 350 adults, (136 of whom are seniors) in Mountain Plains.

Sex Ratio

Female: 170 (48.6%)
Male: 180 (51.4%)

Demographics

The racial composition of Mountain Plains includes 82.86% White, 7.43% Asian, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White29082.86%
Two or more races349.71%
Asian267.43%
Race
Population ↓
Percentage (of total)
Two or more races20.57%
Race
Population ↓
Percentage (of total)
White29082.86%
Two or more races329.14%
Asian267.43%

Mountain Plains Marital Status

Economics and Income Statistics

Mountain Plains ' average per capita income is $102,609. Household income levels show a median of $248,558. The poverty rate stands at 0%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Families$249,038$394,202
Married Families$249,038-
Households$248,558$372,092
Non Families--

$102,609

Average Income

$248,558

Median Household Income

0%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)