How South Dakota Compares

South Dakota

38.0 years

National

38.9 years

2.3% below

State Ranking

Rank	State	Value
#37	Washington	38.3 years
#38	Indiana	38.1 years
#39	Louisiana	38.0 years
#40	South Dakota	38.0 years
#41	California	37.9 years
#42	Colorado	37.7 years
#43	Georgia	37.6 years

View full state ranking →

Highest Age Counties in South Dakota

#	County	Age
1	Custer County	57.6 years
2	Fall River County	55.3 years
3	Hyde County	53.7 years
4	Campbell County	50.9 years
5	McPherson County	50.0 years
6	Potter County	49.9 years
7	Miner County	48.4 years
8	Haakon County	47.9 years
9	Jerauld County	46.9 years
10	Sully County	46.9 years

Lowest Age Counties in South Dakota

#	County	Age
66	Buffalo County	22.8 years
65	Clay County	24.9 years
64	Todd County	25.5 years
63	Bennett County	27.4 years
62	Dewey County	27.7 years
61	Brookings County	28.0 years
60	Oglala Lakota County	28.2 years
59	Corson County	29.9 years
58	Hamlin County	31.8 years
57	Jones County	33.9 years

Median Age in South Dakota

South Dakota has a median age of 38.0 years, ranking #40 of 52 among all 52 states and territories. This is 2.3% below the national value of 38.9 years.

Across South Dakota's 66 counties, median age ranges from 22.8 years to 57.6 years. The county with the highest value is Custer County at 57.6 years.

The median age of the total population.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.