Median Age in Clark County, SD
ACS 2024 5-Year Estimates
40.3 years
Rank #2,042/3,222 · #38 in SD
37th
Clark 40.3 years
SD 38.0 years +6.1%
US 38.9 years +3.6%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Clark County's median age of 40.3 years compares to all 3,222 U.S. counties. Values range from 21.4 years to 86.2 years.
Distribution of Median Age Across All Counties
Ranking Context
Counties ranked closest to Clark County for median age.
Nearby Rankings
Full ranking →| #2,039 | Shelby County, OH | 40.3 years |
| #2,040 | Harmon County, OK | 40.3 years |
| #2,041 | Lane County, OR | 40.3 years |
| #2,042 | Clark County, SD | 40.3 years |
| #2,043 | Delta County, TX | 40.3 years |
| #2,044 | Greene County, VA | 40.3 years |
| #2,045 | Marion County, WV | 40.3 years |
About Median Age
Clark County, South Dakota has a median age of 40.3 years, ranking #2,042 of 3,222 counties nationwide — 3.6% above the national value of 38.9 years. Within South Dakota, it ranks #38 of 66. This places it in the 37th percentile nationally.
The median age of the total population. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.