Median Age in St. Charles County, MO
ACS 2024 5-Year Estimates
How St. Charles County Compares
National Distribution
Where St. Charles County falls among all 3,222 U.S. counties for median age.
■ St. Charles County: 39.8 years
Ranking Context
| Rank | County | Value |
|---|---|---|
| #2,175 | Washington County, MN | 39.8 years |
| #2,176 | Clay County, MS | 39.8 years |
| #2,177 | Livingston County, MO | 39.8 years |
| #2,178 | St. Charles County, MO | 39.8 years |
| #2,179 | Liberty County, MT | 39.8 years |
| #2,180 | Clinton County, PA | 39.8 years |
| #2,181 | Lexington County, SC | 39.8 years |
Median Age in St. Charles County, Missouri
St. Charles County, Missouri has a median age of 39.8 years, which ranks #2,178 of 3,222 out of 3,222 counties nationwide. This is 2.3% above the national value of 38.9 years.
Within Missouri, St. Charles County ranks #78 of 115 out of 115 counties. This places it in the 32th 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.