Median Age in Rock County, WI
ACS 2024 5-Year Estimates
40.3 years
Rank #2,046/3,222 · #56 in WI
37th
Rock 40.3 years
WI 40.2 years +0.2%
US 38.9 years +3.6%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How Rock 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 Rock County for median age.
Nearby Rankings
Full ranking →| #2,043 | Delta County, TX | 40.3 years |
| #2,044 | Greene County, VA | 40.3 years |
| #2,045 | Marion County, WV | 40.3 years |
| #2,046 | Rock County, WI | 40.3 years |
| #2,047 | Jackson County, AR | 40.2 years |
| #2,048 | South Central Connecticut Planning Region, CT | 40.2 years |
| #2,049 | Bradford County, FL | 40.2 years |
About Median Age
Rock County, Wisconsin has a median age of 40.3 years, ranking #2,046 of 3,222 counties nationwide — 3.6% above the national value of 38.9 years. Within Wisconsin, it ranks #56 of 72. 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.