Marshall County, South Dakota
Located in South Dakota, Marshall County has a population of 4,344 residents and a median age of 42.5 years, making it the #2,943 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 6.1%. The median home value is $156,500, and the median household income is $78,156, which is 4% above the national median.
Demographics
Marshall County has a population of 4,344, making it the #2,943 most populous county in the US. The median age is 42.5 years, which is 9.3% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Marshall County is $78,156, ranking #663 out of 3,222 counties — 4.0% above the national median. The poverty rate is 6.1% and unemployment stands at 0.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Marshall County is $156,500 (-44.5% vs national). Renters pay a median of $752/mo and the homeownership rate is 80.3%.
Median Home Value Trend
Rankings →Household Type
Education
In Marshall County, 25.4% of adults age 25+ hold a bachelor's degree or higher, which is 24.6% below the national average, ranking #1,172 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Marshall County is 79.3 years. 12.9% of adults report poor or fair health and 10.5% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
14.7% of adults in Marshall County smoke , 32.9% are obese , and 23.6% report excessive drinking.
Adult Smoking Trend
Safety
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Families & Children
14.1% of children in Marshall County live in poverty . The teen birth rate is 14.6 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Marshall County is 60.5%. The mean commute time is 18.6 min, which is 32.7% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Marshall County voted Republican with a margin of 24.0%. The vote was 37.1% Dem / 61.1% Rep. Compared to 2020, the margin shifted 4.3 toward Republicans .
Vote Share Over Time
About Marshall County, South Dakota
Marshall County, South Dakota has a total population of 4,344, making it the 2,943rd most populous county in the United States. The median age in Marshall County is 42.5 years, which is 9.3% above the national median of 38.9 years.
The median household income in Marshall County is $78,156, which ranks #663 of 3,222 counties nationwide. This is 4.0% above the national median of $75,149. The poverty rate is 6.1%, lower than the national rate of 12.6%. The unemployment rate stands at 0.3%.
The median home value in Marshall County is $156,500, 44.5% below the national median. Renters in Marshall County pay a median gross rent of $752 per month. The homeownership rate is 80.3%, compared to the national rate of 64.4%.
In Marshall County, 25.4% of residents aged 25 and older hold a bachelor's degree or higher, 24.6% below the national average of 33.7%. Health insurance coverage stands at 96.1% of the population. The average commute time for workers is 18.6 min.
Marshall County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 83.7% of the population, followed by Hispanic or Latino (6.4%) and American Indian (non-Hispanic) (5.5%).
All data for Marshall County, South Dakota comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.