Median Age in Day County, SD
ACS 2024 5-Year Estimates
44.8 years
Rank #776/3,222 · #14 in SD
76th
Day 44.8 years
SD 38.0 years +17.9%
US 38.9 years +15.2%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Day County's median age of 44.8 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 Day County for median age.
Nearby Rankings
Full ranking →| #773 | Iron County, MO | 44.8 years |
| #774 | Herkimer County, NY | 44.8 years |
| #775 | Tioga County, NY | 44.8 years |
| #776 | Day County, SD | 44.8 years |
| #777 | Lawrence County, SD | 44.8 years |
| #778 | Culberson County, TX | 44.8 years |
| #779 | Gloucester County, VA | 44.8 years |
About Median Age
Day County, South Dakota has a median age of 44.8 years, ranking #776 of 3,222 counties nationwide — 15.2% above the national value of 38.9 years. Within South Dakota, it ranks #14 of 66. This places it in the 76th 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.