How Union County Compares

Union County

41.5 years

South Dakota Average

41.5 years

Rank #34 of 66 in state

National

38.9 years

6.7% above

National Distribution

Where Union County falls among all 3,222 U.S. counties for median age.

21.4 years 86.2 years

■ Union County: 41.5 years

Ranking Context

Rank	County	Value
#1,660	Lincoln County, OK	41.5 years
#1,661	Jefferson County, OR	41.5 years
#1,662	Brule County, SD	41.5 years
#1,663	Union County, SD	41.5 years
#1,664	Anderson County, TN	41.5 years
#1,665	Cheatham County, TN	41.5 years
#1,666	Summit County, UT	41.5 years

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Median Age in Union County, South Dakota

Union County, South Dakota has a median age of 41.5 years, which ranks #1,663 of 3,222 out of 3,222 counties nationwide. This is 6.7% above the national value of 38.9 years.

Within South Dakota, Union County ranks #34 of 66 out of 66 counties. This places it in the 48th percentile nationally.

The median age of the total population. All data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates for 2024.

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.