Stephenson County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Stephenson County, Illinois
Stephenson County, Illinois Age & Gender Statistics (2024)
Total Population
43,768
Median Age
45.3
Male Median
43.2
Female Median
47.3
Stephenson County, Illinois Population Growth
Stephenson County, Illinois Demographic Trend
Since 2010, the population of has changed by -8.4%%.
-8.4%% Growth
Stephenson County, Illinois Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Stephenson County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 45.3 | 43,768 |
| 2023 | 45.2 | 44,042 |
| 2022 | 45.6 | 44,482 |
| 2021 | 45.6 | 44,817 |
| 2020 | 45.5 | 44,683 |
| 2019 | 45.3 | 45,093 |
| 2018 | 45.1 | 45,433 |
| 2017 | 44.7 | 45,839 |
| 2016 | 44.6 | 46,283 |
| 2015 | 44.3 | 46,625 |
| 2014 | 44.2 | 47,053 |
| 2013 | 43.7 | 47,315 |
| 2012 | 43.7 | 47,532 |
| 2011 | 43.3 | 47,730 |
| 2010 | 43.0 | 47,791 |
Stephenson County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.3% |
| 5–17 | 16.0% |
| 18–24 | 7.5% |
| 25–34 | 10.5% |
| 35–54 | 21.9% |
| 55–64 | 14.6% |
| 65+ | 24.4% |
Dependency Ratios for Stephenson County, Illinois
- Total Dependency Ratio:
- 83.9
- Youth Dependency:
- 39.1
- Old-Age Dependency:
- 44.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Stephenson County, Illinois
The median age in Stephenson County, Illinois is 45.3 years.
According to latest Census data, the total population of Stephenson County, Illinois is 43,768.
In Stephenson County, Illinois, seniors (ages 65+) make up 24.4% of the population, while children under 18 represent 16.0%.
Based on historical data since 2010, the population in Stephenson County, Illinois is aging.