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 2025 population of 601. Mountain Plains is currently growing at a rate of 7.13% annually and its population has increased by 52.54% since the most recent census, which recorded a population of 394 in 2020.

The average household income in Mountain Plains is $321,188 with a poverty rate of 0%.The median age in Mountain Plains is 62.6 years: 63.4 years for males, and 60.4 years for females.

Demographics

The racial composition of Mountain Plains includes 89.32% White, 4.37% Asian, and smaller percentages for and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	368	89.32%
Two or more races	26	6.31%
Asian	18	4.37%

Mountain Plains Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Mountain Plains' average per capita income is $68,947. Household income levels show a median of $166,641. 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
Households	$166,641	$321,188
Families	$166,641	$321,188
Married Families	$166,641	-
Non Families	-	-

$68,947

Average Income

$166,641

Median Household Income

0%

Poverty Rate