Will County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Will County, Illinois
Will County, Illinois Age & Gender Statistics (2024)
Total Population
701,462
Median Age
39.1
Male Median
38.3
Female Median
39.8
Will County, Illinois Population Growth

Will County, Illinois Demographic Trend
Since 2010, the population of has changed by +5.0%%.
+5.0%% Growth
Will County, Illinois Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Will County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.1 | 701,462 |
| 2023 | 38.9 | 698,450 |
| 2022 | 38.7 | 696,774 |
| 2021 | 38.3 | 696,403 |
| 2020 | 38.1 | 689,704 |
| 2019 | 37.9 | 689,315 |
| 2018 | 37.6 | 688,697 |
| 2017 | 37.3 | 687,727 |
| 2016 | 37.0 | 685,378 |
| 2015 | 36.6 | 683,995 |
| 2014 | 36.2 | 682,108 |
| 2013 | 35.8 | 679,688 |
| 2012 | 35.5 | 677,669 |
| 2011 | 35.2 | 674,166 |
| 2010 | 34.9 | 667,977 |
Will County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.4% |
| 5–17 | 18.2% |
| 18–24 | 9.0% |
| 25–34 | 12.1% |
| 35–54 | 27.7% |
| 55–64 | 13.0% |
| 65+ | 14.6% |
Dependency Ratios for Will County, Illinois
- Total Dependency Ratio:
- 61.8
- Youth Dependency:
- 38.2
- Old-Age Dependency:
- 23.6
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Will County, Illinois
The median age in Will County, Illinois is 39.1 years.
According to latest Census data, the total population of Will County, Illinois is 701,462.
In Will County, Illinois, seniors (ages 65+) make up 14.6% of the population, while children under 18 represent 18.2%.
Based on historical data since 2010, the population in Will County, Illinois is aging.