Cook County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Cook County, Illinois
Cook County, Illinois Age & Gender Statistics (2024)
Total Population
5,182,090
Median Age
38.0
Male Median
37.0
Female Median
39.0
Cook County, Illinois Population Growth
Cook County, Illinois Demographic Trend
Since 2010, the population of has changed by +0.2%%.
+0.2%% Growth
Cook County, Illinois Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Cook County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 38.0 | 5,182,090 |
| 2023 | 37.8 | 5,185,812 |
| 2022 | 37.5 | 5,225,367 |
| 2021 | 37.3 | 5,265,398 |
| 2020 | 37.0 | 5,169,517 |
| 2019 | 36.8 | 5,198,275 |
| 2018 | 36.6 | 5,223,719 |
| 2017 | 36.4 | 5,238,541 |
| 2016 | 36.1 | 5,227,575 |
| 2015 | 35.9 | 5,236,393 |
| 2014 | 35.7 | 5,227,827 |
| 2013 | 35.5 | 5,212,372 |
| 2012 | 35.3 | 5,197,677 |
| 2011 | 35.2 | 5,182,969 |
| 2010 | 35.1 | 5,172,848 |
Cook County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.4% |
| 5–17 | 15.7% |
| 18–24 | 8.7% |
| 25–34 | 15.8% |
| 35–54 | 26.3% |
| 55–64 | 12.1% |
| 65+ | 16.0% |
Dependency Ratios for Cook County, Illinois
- Total Dependency Ratio:
- 58.8
- Youth Dependency:
- 33.5
- Old-Age Dependency:
- 25.4
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Cook County, Illinois
The median age in Cook County, Illinois is 38.0 years.
According to latest Census data, the total population of Cook County, Illinois is 5,182,090.
In Cook County, Illinois, seniors (ages 65+) make up 16.0% of the population, while children under 18 represent 15.7%.
Based on historical data since 2010, the population in Cook County, Illinois is aging.