LaSalle County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for LaSalle County, Illinois
LaSalle County, Illinois Age & Gender Statistics (2024)
Total Population
108,714
Median Age
42.2
Male Median
40.7
Female Median
43.4
LaSalle County, Illinois Population Growth

LaSalle County, Illinois Demographic Trend
Since 2010, the population of has changed by -4.5%%.
-4.5%% Growth
LaSalle County, Illinois Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
LaSalle County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 42.2 | 108,714 |
| 2023 | 42.1 | 109,049 |
| 2022 | 41.9 | 109,495 |
| 2021 | 41.8 | 109,986 |
| 2020 | 42.1 | 108,998 |
| 2019 | 41.9 | 109,737 |
| 2018 | 41.8 | 110,401 |
| 2017 | 41.8 | 111,151 |
| 2016 | 41.8 | 111,935 |
| 2015 | 41.6 | 112,579 |
| 2014 | 41.6 | 112,698 |
| 2013 | 41.3 | 113,295 |
| 2012 | 41.1 | 113,688 |
| 2011 | 40.9 | 113,865 |
| 2010 | 40.5 | 113,789 |
LaSalle County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.2% |
| 5–17 | 16.0% |
| 18–24 | 7.9% |
| 25–34 | 12.0% |
| 35–54 | 24.4% |
| 55–64 | 14.6% |
| 65+ | 19.9% |
Dependency Ratios for LaSalle County, Illinois
- Total Dependency Ratio:
- 69.8
- Youth Dependency:
- 36.0
- Old-Age Dependency:
- 33.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for LaSalle County, Illinois
The median age in LaSalle County, Illinois is 42.2 years.
According to latest Census data, the total population of LaSalle County, Illinois is 108,714.
In LaSalle County, Illinois, seniors (ages 65+) make up 19.9% of the population, while children under 18 represent 16.0%.
Based on historical data since 2010, the population in LaSalle County, Illinois is aging.