Gregory County, South Dakota
Located in South Dakota, Gregory County has a population of 4,016 residents and a median age of 44.7 years, making it the #2,962 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 9.5%. The median home value is $139,900, and the median household income is $62,917, which is 16% below the national median.
Demographics
Gregory County has a population of 4,016, making it the #2,962 most populous county in the US. The median age is 44.7 years, which is 14.9% 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 Gregory County is $62,917, ranking #1,805 out of 3,222 counties — 16.3% below the national median. The poverty rate is 9.5% and unemployment stands at 2.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Gregory County is $139,900 (-50.4% vs national). Renters pay a median of $614/mo and the homeownership rate is 76.7%.
Median Home Value Trend
Rankings →Household Type
Education
In Gregory County, 22.2% of adults age 25+ hold a bachelor's degree or higher, which is 34.2% below the national average, ranking #1,620 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Gregory County is 73.7 years. 17.2% of adults report poor or fair health and 15.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
19.6% of adults in Gregory County smoke , 36.8% are obese , and 22.8% report excessive drinking.
Adult Smoking Trend
Safety
. Motor vehicle deaths occur at a rate of 40.7 per 100,000.
Motor Vehicle Deaths Trend
Families & Children
17.4% of children in Gregory County live in poverty . The teen birth rate is 12.7 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Gregory County is 70.8%. The mean commute time is 17.4 min, which is 37.1% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Gregory County voted Republican with a margin of 60.2%. The vote was 18.8% Dem / 79% Rep. Compared to 2020, the margin shifted 2.0 toward Republicans .
Vote Share Over Time
About Gregory County, South Dakota
Gregory County, South Dakota has a total population of 4,016, making it the 2,962nd most populous county in the United States. The median age in Gregory County is 44.7 years, which is 14.9% above the national median of 38.9 years.
The median household income in Gregory County is $62,917, which ranks #1,805 of 3,222 counties nationwide. This is 16.3% below the national median of $75,149. The poverty rate is 9.5%, lower than the national rate of 12.6%. The unemployment rate stands at 2.3%.
The median home value in Gregory County is $139,900, 50.4% below the national median. Renters in Gregory County pay a median gross rent of $614 per month. The homeownership rate is 76.7%, compared to the national rate of 64.4%.
In Gregory County, 22.2% of residents aged 25 and older hold a bachelor's degree or higher, 34.2% below the national average of 33.7%. Health insurance coverage stands at 91.7% of the population. The average commute time for workers is 17.4 min.
Gregory County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 86.2% of the population, followed by Two or More Races (7.0%) and American Indian (non-Hispanic) (4.0%).
All data for Gregory 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.