RANKING · 2024 ACS · 19 SHOWN OF 19

Oldest by median age, South Dakota cities

South Dakota cities ranked by median age of residents (2024 ACS). This list covers the 19 cities in South Dakota that qualify, ranked against each other statewide. The median across all 19 is 38.3. Biggest climber in the top 100 since 2020: Madison, SD, up 10 places to #4.

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South DakotaAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01▲7Rapid Valley, SDSD6,97543.2+42%

02Yankton, SDSD15,81641.4+10%

03▼2Sturgis, SDSD6,92240.3+1%

04▲10Madison, SDSD6,06540.1+21%

05▲4Spearfish, SDSD14,15440.0+26%

06▼2Mitchell, SDSD15,75639.6+11%

07▼1Watertown, SDSD23,73639.5+13%

08▼3Pierre, SDSD13,84839.4+5%

09▼2Rapid City, SDSD80,58939.1+12%

10▼7Belle Fourche, SDSD5,79138.3+1%

11Brandon, SDSD11,30636.7+17%

12▼2Aberdeen, SDSD27,96136.40%

13Huron, SDSD14,60736.1−10%

14▼2Sioux Falls, SDSD213,74835.5+8%

15▲1Harrisburg, SDSD10,40531.1+3%

16▼1Tea, SDSD8,01930.6+9%

17Box Elder, SDSD13,93628.8+10%

18Brookings, SDSD25,35524.7+5%

19Vermillion, SDSD11,72023.1−3%

SHOWING 1–19 OF 19

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES