St. Charles County, Missouri Age & Gender Distribution (2024)
Population distribution by age and gender for St. Charles County, Missouri
St. Charles County, Missouri Age & Gender Statistics (2024)
Total Population
414,535
Median Age
39.8
Male Median
38.8
Female Median
40.8
St. Charles County, Missouri Population Growth
St. Charles County, Missouri Demographic Trend
Since 2010, the population of has changed by +18.2%%.
+18.2%% Growth
St. Charles County, Missouri Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
St. Charles County, Missouri Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.8 | 414,535 |
| 2023 | 39.6 | 409,830 |
| 2022 | 39.4 | 406,262 |
| 2021 | 39.2 | 402,377 |
| 2020 | 39.0 | 398,472 |
| 2019 | 38.6 | 394,290 |
| 2018 | 38.2 | 389,985 |
| 2017 | 38.0 | 385,115 |
| 2016 | 37.7 | 379,856 |
| 2015 | 37.4 | 374,805 |
| 2014 | 37.3 | 369,781 |
| 2013 | 37.1 | 365,101 |
| 2012 | 37.0 | 360,695 |
| 2011 | 36.8 | 356,070 |
| 2010 | 36.6 | 350,606 |
St. Charles County, Missouri Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.4% |
| 5–17 | 17.1% |
| 18–24 | 8.1% |
| 25–34 | 12.4% |
| 35–54 | 26.6% |
| 55–64 | 13.3% |
| 65+ | 17.0% |
Dependency Ratios for St. Charles County, Missouri
- Total Dependency Ratio:
- 65.3
- Youth Dependency:
- 37.2
- Old-Age Dependency:
- 28.1
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for St. Charles County, Missouri
The median age in St. Charles County, Missouri is 39.8 years.
According to latest Census data, the total population of St. Charles County, Missouri is 414,535.
In St. Charles County, Missouri, seniors (ages 65+) make up 17.0% of the population, while children under 18 represent 17.1%.
Based on historical data since 2010, the population in St. Charles County, Missouri is aging.