Mercer County, Pennsylvania Age & Gender Distribution (2024)
Population distribution by age and gender for Mercer County, Pennsylvania
Mercer County, Pennsylvania Age & Gender Statistics (2024)
Total Population
109,257
Median Age
45.1
Male Median
43.0
Female Median
47.3
Mercer County, Pennsylvania Population Growth

Mercer County, Pennsylvania Demographic Trend
Since 2010, the population of has changed by -6.9%%.
-6.9%% Growth
Mercer County, Pennsylvania Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Mercer County, Pennsylvania Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 45.1 | 109,257 |
| 2023 | 45.2 | 109,852 |
| 2022 | 45.0 | 110,600 |
| 2021 | 44.8 | 111,216 |
| 2020 | 45.0 | 110,519 |
| 2019 | 44.7 | 111,518 |
| 2018 | 44.6 | 112,630 |
| 2017 | 44.4 | 113,623 |
| 2016 | 44.1 | 114,598 |
| 2015 | 43.8 | 115,320 |
| 2014 | 43.6 | 115,739 |
| 2013 | 43.1 | 116,059 |
| 2012 | 42.8 | 116,474 |
| 2011 | 42.6 | 116,939 |
| 2010 | 42.2 | 117,296 |
Mercer County, Pennsylvania Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.8% |
| 5–17 | 14.2% |
| 18–24 | 9.2% |
| 25–34 | 10.6% |
| 35–54 | 23.2% |
| 55–64 | 14.9% |
| 65+ | 23.1% |
Dependency Ratios for Mercer County, Pennsylvania
- Total Dependency Ratio:
- 72.6
- Youth Dependency:
- 32.7
- Old-Age Dependency:
- 39.9
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Mercer County, Pennsylvania
The median age in Mercer County, Pennsylvania is 45.1 years.
According to latest Census data, the total population of Mercer County, Pennsylvania is 109,257.
In Mercer County, Pennsylvania, seniors (ages 65+) make up 23.1% of the population, while children under 18 represent 14.2%.
Based on historical data since 2010, the population in Mercer County, Pennsylvania is aging.