South Dakota Population and Demographics

Published: October 1, 2020 11:02 am

Population

South Dakota is a state in the Midwestern United States with a population of 864,289 and land area of 75,811 square miles. It ranks as the fifth smallest state by population and the 16th largest state by area.

Race and Ethnicity

According to the most recent estimates from the U.S. Census Bureau, 82.20% of state residents identify as white, 1.80% as Black or African American, 8.40% as American Indian or Alaska Native, 1.50% as Asian, 0.00% as Native Hawaiian or other Pacific Islander, 3.70% as Hispanic or Latino, and 2.40% as some other race or combination of races.

Nationally, some 61.1% of Americans identify as white, 12.3% as Black or African American, 0.7% as American Indian or Alaska Native, 5.4% as Asian, 0.2% as Native Hawaiian or other Pacific Islander, 17.8% as Hispanic or Latino, and 2.6% as some other race or combination of races.

Ancestry

Census respondents are also asked to report ancestry. Some of the most commonly reported ancestries in South Dakota include German, Norwegian, Irish, English, and Dutch. Measured by location quotient -- comparing the state share to the national share -- some of the most highly concentrated ancestries in South Dakota are Norwegian, Luxembourger, and Czech.

Native and foreign-born population

An estimated 96.50% of South Dakota residents are native-born, meaning they were born in the United States, Puerto Rico, a U.S. Island Area, or abroad to a U.S. citizen.

Of the 3.50% of the population that is foreign-born, 37.10% have become naturalized U.S. citizens. Nationwide, 86.5% of Americans are native-born. And of the 13.5% of Americans who are foreign-born, 48.8% have become naturalized U.S. citizens.

Age

The population of South Dakota is younger than the United States as a whole. The median age in the state is 36.8 years old, 1.1 years less than the national median age of 37.9 years. An estimated 15.80% of the population is 65 years and over, compared to 15.2% of the U.S. population.

Family and household composition

Family and household composition also varies heavily across the United States. In South Dakota, 49.90% of households are occupied by married-couple families, compared to the 48.3% national figure. Some 4.30% of households are occupied by single male householders, 9.30% by single female householders, and 36.50% by non-family occupants. Nationwide, 4.9% of households are occupied by single male householders, 12.6% by single female householders, and 34.3% by non-family occupants. An estimated 68.10% of heads of household own their homes, compared to the national homeownership rate of 63.8%.

Language spoken

As is the case across the United States, English is the most commonly spoken language in South Dakota. Of the 803,900 people aged 5 and up living in South Dakota, 97.8% speak English exclusively, or, if they are multilingual, speak English very well. Not only is English the predominantly spoken language in the state, its usage is even more common than it is nationwide where an average of 91.5% of the 5 and older population only speaks English, or speak it very well.

Spanish is the second most commonly spoken language in the United States. In South Dakota, 2% of the population aged 5 and older speaks Spanish, the 6th smallest share among all states. Nationwide, 13.3% of all Americans in the same age group speak Spanish.

Marital status

Residents of South Dakota are more likely to be married than the typical American. Of the 684,900 South Dakota residents aged 15 and older, 51.9% are currently married, compared to 48.1% of Americans nationwide in the same age group. Divorce, meanwhile, is less common in the state than it is nationwide. In South Dakota, 10.5% of the 15 and older population is divorced, compared to the 10.8% share of the same age group across the U.S. as a whole.

An estimated 30.5% of South Dakota residents 15 and older have never married, compared to one-third of Americans in the same age group.

Veterans

In South Dakota, 9.1% of the 18 and over population are veterans -- above the 7.5% of adult civilians who have served in the military nationwide. Compared to other states, South Dakota is home to the 15th largest share of military veterans.

As is the case nationwide, the largest share of veterans living in the state served in the Vietnam era. Of South Dakota’s 59,200 resident veterans, 3.6% served in World War II, 37.4% served in the Vietnam War, 20.2% served in the period between the beginning of the Gulf War and 2001, and 19.5% served since the terrorist attacks of Sept. 11, 2001. An additional 5,800 men and women served during the Korean War.

Educational attainment

In South Dakota, adults are more likely to have a high school education than the typical American adult, but less likely to have a four-year college education. Among South Dakota residents 25 and older, 91.7% have a high school diploma or equivalent, and 28.5% have a bachelor’s degree or higher, compared to 87.7% and 31.5% of adults nationwide, respectively.

Income

Though it is not always the case, incomes tend to rise with educational attainment rates across broad populations -- and South Dakota is no exception. With a lower than average bachelor’s degree attainment rate, the state also has a lower than average median income. The typical household in South Dakota earns $56,499 a year, about $3,800 less than the national median household income of $60,293.

Additionally, South Dakota has a lower than average concentration of wealthy residents. An estimated 3.9% of households in the state earn $200,000 or more annually, compared to 7.0% of households nationwide.

Poverty

Despite the lower than average median household income, serious financial hardship is less common in the state than it is nationwide. The poverty rate in South Dakota stands at 13.6%, while the national poverty rate is 14.1%.