Lake County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Lake County, Illinois
Lake County, Illinois Age & Gender Statistics (2024)
Total Population
714,223
Median Age
39.1
Male Median
37.9
Female Median
40.3
Lake County, Illinois Population Growth
Lake County, Illinois Demographic Trend
Since 2010, the population of has changed by +2.4%%.
+2.4%% Growth
Lake County, Illinois Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Lake County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.1 | 714,223 |
| 2023 | 38.9 | 711,885 |
| 2022 | 38.7 | 713,159 |
| 2021 | 38.5 | 714,484 |
| 2020 | 38.5 | 699,682 |
| 2019 | 38.4 | 701,473 |
| 2018 | 38.2 | 703,619 |
| 2017 | 38.0 | 704,476 |
| 2016 | 37.8 | 702,890 |
| 2015 | 37.6 | 702,898 |
| 2014 | 37.2 | 703,170 |
| 2013 | 37.0 | 702,099 |
| 2012 | 36.7 | 701,282 |
| 2011 | 36.4 | 700,424 |
| 2010 | 36.1 | 697,179 |
Lake County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.3% |
| 5–17 | 18.0% |
| 18–24 | 10.2% |
| 25–34 | 11.4% |
| 35–54 | 26.1% |
| 55–64 | 13.3% |
| 65+ | 15.8% |
Dependency Ratios for Lake County, Illinois
- Total Dependency Ratio:
- 64.1
- Youth Dependency:
- 38.2
- Old-Age Dependency:
- 25.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Lake County, Illinois
The median age in Lake County, Illinois is 39.1 years.
According to latest Census data, the total population of Lake County, Illinois is 714,223.
In Lake County, Illinois, seniors (ages 65+) make up 15.8% of the population, while children under 18 represent 18.0%.
Based on historical data since 2010, the population in Lake County, Illinois is aging.