# Counties in South Dakota by median age, 2024

All 66 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `median_age`
- Unit: years
- Definition: Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/median-age/south-dakota-counties
- CSV: https://invokely.ai/download/rankings/median-age/south-dakota-counties.csv

| Rank | Place | years |
|---:|---|---:|
| 1 | Custer County | 57.6 |
| 2 | Fall River County | 55.3 |
| 3 | Hyde County | 53.7 |
| 4 | Campbell County | 50.9 |
| 5 | McPherson County | 50 |
| 6 | Potter County | 49.9 |
| 7 | Miner County | 48.4 |
| 8 | Haakon County | 47.9 |
| 9 | Jerauld County | 46.9 |
| 9 | Sully County | 46.9 |
| 11 | Harding County | 46.3 |
| 12 | Spink County | 45.5 |
| 13 | Tripp County | 45 |
| 14 | Day County | 44.8 |
| 14 | Lawrence County | 44.8 |
| 16 | Gregory County | 44.7 |
| 17 | Grant County | 44.5 |
| 17 | Stanley County | 44.5 |
| 19 | Edmunds County | 44 |
| 19 | Perkins County | 44 |
| 21 | Lake County | 43.8 |
| 22 | Faulk County | 42.9 |
| 23 | Hand County | 42.5 |
| 23 | Marshall County | 42.5 |
| 23 | Yankton County | 42.5 |
| 26 | Bon Homme County | 42.1 |
| 26 | Hutchinson County | 42.1 |
| 26 | Kingsbury County | 42.1 |
| 29 | Douglas County | 42 |
| 30 | Deuel County | 41.8 |
| 31 | Aurora County | 41.7 |
| 31 | Walworth County | 41.7 |
| 33 | Brule County | 41.5 |
| 33 | Union County | 41.5 |
| 35 | Turner County | 41.2 |
| 36 | Moody County | 40.8 |
| 37 | Codington County | 40.4 |
| 38 | Clark County | 40.3 |
| 39 | Butte County | 40.2 |
| 40 | Pennington County | 40.1 |
| 40 | Sanborn County | 40.1 |
| 42 | Davison County | 39.6 |
| 43 | Hughes County | 39.5 |
| 43 | McCook County | 39.5 |
| 45 | Roberts County | 38.5 |
| 46 | Hanson County | 38.3 |
| 47 | Brown County | 37.8 |
| 48 | Beadle County | 37.6 |
| 49 | Mellette County | 37.5 |
| 50 | Meade County | 37.3 |
| 51 | Ziebach County | 36.7 |
| 52 | Lyman County | 36.1 |
| 53 | Charles Mix County | 36 |
| 53 | Minnehaha County | 36 |
| 55 | Lincoln County | 35.9 |
| 56 | Jackson County | 34.3 |
| 57 | Jones County | 33.9 |
| 58 | Hamlin County | 31.8 |
| 59 | Corson County | 29.9 |
| 60 | Oglala Lakota County | 28.2 |
| 61 | Brookings County | 28 |
| 62 | Dewey County | 27.7 |
| 63 | Bennett County | 27.4 |
| 64 | Todd County | 25.5 |
| 65 | Clay County | 24.9 |
| 66 | Buffalo County | 22.8 |