Monroe County, Illinois Age & Gender Distribution (2024)
Population distribution by age and gender for Monroe County, Illinois
Monroe County, Illinois Age & Gender Statistics (2024)
Total Population
35,036
Median Age
43.2
Male Median
42.5
Female Median
44.2
Monroe County, Illinois Population Growth

Monroe County, Illinois Demographic Trend
Since 2010, the population of has changed by +8.0%%.
+8.0%% Growth
Monroe County, Illinois Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Monroe County, Illinois Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 43.2 | 35,036 |
| 2023 | 42.5 | 34,969 |
| 2022 | 42.5 | 34,905 |
| 2021 | 42.3 | 34,732 |
| 2020 | 42.3 | 34,444 |
| 2019 | 42.0 | 34,168 |
| 2018 | 42.6 | 33,936 |
| 2017 | 42.3 | 33,739 |
| 2016 | 42.3 | 33,703 |
| 2015 | 42.1 | 33,539 |
| 2014 | 41.7 | 33,373 |
| 2013 | 40.7 | 33,181 |
| 2012 | 40.5 | 33,003 |
| 2011 | 40.3 | 32,767 |
| 2010 | 40.1 | 32,431 |
Monroe County, Illinois Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.2% |
| 5–17 | 16.7% |
| 18–24 | 6.6% |
| 25–34 | 10.5% |
| 35–54 | 26.1% |
| 55–64 | 15.3% |
| 65+ | 19.7% |
Dependency Ratios for Monroe County, Illinois
- Total Dependency Ratio:
- 71.1
- Youth Dependency:
- 37.4
- 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 Monroe County, Illinois
The median age in Monroe County, Illinois is 43.2 years.
According to latest Census data, the total population of Monroe County, Illinois is 35,036.
In Monroe County, Illinois, seniors (ages 65+) make up 19.7% of the population, while children under 18 represent 16.7%.
Based on historical data since 2010, the population in Monroe County, Illinois is aging.