Gregory County, South Dakota Demographics 2026

Population Overview

Gregory County is located in South Dakota with a total population of 3,993. It is the 40th most populous county out of 66 in South Dakota. The county encompasses 5 Census-designated places.

Age Demographics

The median age in Gregory County is 45.7 years. This is 21% higher than the state median of 37.7 years. 11.6% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Gregory County is $52,432. This is 28% lower than the state median of $72,421. Compared to the national median of $78,538, household income here is 33% lower. The poverty rate stands at 11.1%. This is 8% lower than the state poverty rate of 12.0%. The unemployment rate is 3.0%. This is 1% higher than the state rate of 3.0%. The median home value is $129,000. Housing costs are 46% lower than the state median of $236,800. With a home-value-to-income ratio of just 2.5x, Gregory County is one of the most affordable housing markets in the area. 78.3% of occupied housing units are owner-occupied. This homeownership rate is 14% higher than the state average of 68.6%.

Race & Ethnicity

Gregory County has a predominantly White (non-Hispanic) population, comprising 86.7% of all residents. Hispanic or Latino residents account for 1.1%. The Black or African American population (1.0%) is well below the state average of 2.2%. The Hispanic or Latino population (1.1%) is well below the state average of 4.6%. The Asian population (0.1%) is well below the state average of 1.4%.

Education

20.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 33% lower than the state rate of 31.1%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.3%.