Median Age in St. Clair County, MI
ACS 2024 5-Year Estimates
44.5 years
Rank #825/3,222 · #39 in MI
74th
St. Clair 44.5 years
MI 40.2 years +10.7%
US 38.9 years +14.4%
Median Age Trend
Rankings →Percentile Rank Over Time
Year-over-Year Age Change
National Distribution
How St. Clair County's median age of 44.5 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 St. Clair County for median age.
Nearby Rankings
Full ranking →| #822 | Carroll County, AR | 44.5 years |
| #823 | Montezuma County, CO | 44.5 years |
| #824 | Ringgold County, IA | 44.5 years |
| #825 | St. Clair County, MI | 44.5 years |
| #826 | Douglas County, MN | 44.5 years |
| #827 | Jackson County, MN | 44.5 years |
| #828 | Benton County, MS | 44.5 years |
About Median Age
St. Clair County, Michigan has a median age of 44.5 years, ranking #825 of 3,222 counties nationwide — 14.4% above the national value of 38.9 years. Within Michigan, it ranks #39 of 83. This places it in the 74th 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.