Williamson County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Williamson County, Illinois
Williamson County, Illinois Age & Gender Statistics (2024)
Total Population
66,876
Median Age
41.6
Male Median
40.9
Female Median
42.4
Williamson County, Illinois Population Growth
Williamson County, Illinois Demographic Trend
Since 2010, the population of has changed by +2.0%%.
+2.0%% Growth
Williamson County, Illinois Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Williamson County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 41.6 | 66,876 |
| 2023 | 41.4 | 66,902 |
| 2022 | 41.2 | 67,120 |
| 2021 | 41.1 | 67,271 |
| 2020 | 41.0 | 66,929 |
| 2019 | 41.2 | 67,102 |
| 2018 | 40.9 | 67,299 |
| 2017 | 40.9 | 67,477 |
| 2016 | 40.9 | 67,336 |
| 2015 | 41.0 | 67,121 |
| 2014 | 40.7 | 66,808 |
| 2013 | 40.8 | 66,606 |
| 2012 | 40.4 | 66,335 |
| 2011 | 40.4 | 66,025 |
| 2010 | 40.2 | 65,579 |
Williamson County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.2% |
| 5–17 | 16.1% |
| 18–24 | 6.5% |
| 25–34 | 12.7% |
| 35–54 | 26.2% |
| 55–64 | 13.7% |
| 65+ | 19.6% |
Dependency Ratios for Williamson County, Illinois
- Total Dependency Ratio:
- 69.3
- Youth Dependency:
- 36.0
- Old-Age Dependency:
- 33.2
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Williamson County, Illinois
The median age in Williamson County, Illinois is 41.6 years.
According to latest Census data, the total population of Williamson County, Illinois is 66,876.
In Williamson County, Illinois, seniors (ages 65+) make up 19.6% of the population, while children under 18 represent 16.1%.
Based on historical data since 2010, the population in Williamson County, Illinois has remained stable.