Grant County, South Dakota Demographics 2026

Population Overview

Grant County is located in South Dakota with a total population of 7,544. It is the 23rd most populous county out of 66 in South Dakota. The county encompasses 9 Census-designated places.

Age Demographics

The median age in Grant County is 43.7 years. This is 16% higher than the state median of 37.7 years. 10.4% 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 Grant County is $73,818. This is 2% higher than the state median of $72,421. Compared to the national median of $78,538, household income here is 6% lower. The poverty rate stands at 11.2%. This is 7% lower than the state poverty rate of 12.0%. The unemployment rate is 3.6%. This is 21% higher than the state rate of 3.0%. The median home value is $179,400. Housing costs are 24% lower than the state median of $236,800. With a home-value-to-income ratio of just 2.4x, Grant County is one of the most affordable housing markets in the area. 81.6% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 68.6%.

Race & Ethnicity

Grant County has a predominantly White (non-Hispanic) population, comprising 90.0% of all residents. Hispanic or Latino residents account for 6.7%. The Black or African American population (0.6%) is well below the state average of 2.2%. The Asian population (0.6%) is well below the state average of 1.4%.

Education

25.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 18% 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 92.1%.