Boone County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Boone County, Illinois
Boone County, Illinois Age & Gender Statistics (2024)
Total Population
53,230
Median Age
39.7
Male Median
39.2
Female Median
40.2
Boone County, Illinois Population Growth

Boone County, Illinois Demographic Trend
Since 2010, the population of has changed by -0.6%%.
-0.6%% Growth
Boone County, Illinois Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Boone County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.7 | 53,230 |
| 2023 | 39.5 | 53,316 |
| 2022 | 39.0 | 53,459 |
| 2021 | 38.8 | 53,592 |
| 2020 | 38.7 | 53,293 |
| 2019 | 38.5 | 53,537 |
| 2018 | 38.4 | 53,606 |
| 2017 | 38.3 | 53,638 |
| 2016 | 38.3 | 53,656 |
| 2015 | 38.2 | 53,851 |
| 2014 | 38.1 | 54,005 |
| 2013 | 37.3 | 54,068 |
| 2012 | 36.6 | 54,141 |
| 2011 | 36.0 | 54,084 |
| 2010 | 35.8 | 53,567 |
Boone County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.1% |
| 5–17 | 18.7% |
| 18–24 | 9.2% |
| 25–34 | 11.2% |
| 35–54 | 25.8% |
| 55–64 | 13.3% |
| 65+ | 16.7% |
Dependency Ratios for Boone County, Illinois
- Total Dependency Ratio:
- 68.1
- Youth Dependency:
- 40.0
- Old-Age Dependency:
- 28.2
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Boone County, Illinois
The median age in Boone County, Illinois is 39.7 years.
According to latest Census data, the total population of Boone County, Illinois is 53,230.
In Boone County, Illinois, seniors (ages 65+) make up 16.7% of the population, while children under 18 represent 18.7%.
Based on historical data since 2010, the population in Boone County, Illinois is aging.