Washington County, Missouri Age & Gender Distribution (2024)
Population distribution by age and gender for Washington County, Missouri
Washington County, Missouri Age & Gender Statistics (2024)
Total Population
23,470
Median Age
40.7
Male Median
39.8
Female Median
42.1
Washington County, Missouri Population Growth

Washington County, Missouri Demographic Trend
Since 2010, the population of has changed by -6.0%%.
-6.0%% Growth
Washington County, Missouri Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Washington County, Missouri Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 40.7 | 23,470 |
| 2023 | 40.2 | 23,483 |
| 2022 | 39.8 | 23,580 |
| 2021 | 40.2 | 23,791 |
| 2020 | 40.5 | 24,819 |
| 2019 | 40.8 | 24,860 |
| 2018 | 40.7 | 24,931 |
| 2017 | 40.6 | 24,968 |
| 2016 | 40.7 | 25,002 |
| 2015 | 40.1 | 25,048 |
| 2014 | 39.9 | 25,113 |
| 2013 | 40.2 | 25,135 |
| 2012 | 40.1 | 25,120 |
| 2011 | 39.5 | 25,069 |
| 2010 | 39.5 | 24,981 |
Washington County, Missouri Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.6% |
| 5–17 | 18.0% |
| 18–24 | 7.1% |
| 25–34 | 11.8% |
| 35–54 | 25.2% |
| 55–64 | 14.4% |
| 65+ | 17.9% |
Dependency Ratios for Washington County, Missouri
- Total Dependency Ratio:
- 70.9
- Youth Dependency:
- 40.2
- Old-Age Dependency:
- 30.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Washington County, Missouri
The median age in Washington County, Missouri is 40.7 years.
According to latest Census data, the total population of Washington County, Missouri is 23,470.
In Washington County, Missouri, seniors (ages 65+) make up 17.9% of the population, while children under 18 represent 18.0%.
Based on historical data since 2010, the population in Washington County, Missouri has remained stable.