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 Black or African American, Native American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	368	89.32%
Two or more races	26	6.31%
Asian	18	4.37%
Black or African American	0	0%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

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