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

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

Mercer County, Pennsylvania Demographic Trend

Since 2010, the population of has changed by -6.9%%.

-6.9%% Growth

Mercer County, Pennsylvania Age & Gender Pyramid

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


Mercer County, Pennsylvania Historical Population Data

YearMedian AgePopulation
202445.1109,257
202345.2109,852
202245.0110,600
202144.8111,216
202045.0110,519
201944.7111,518
201844.6112,630
201744.4113,623
201644.1114,598
201543.8115,320
201443.6115,739
201343.1116,059
201242.8116,474
201142.6116,939
201042.2117,296

Mercer County, Pennsylvania Age Group Breakdown (2024)

Age CohortPercentage
Under 54.8%
5–1714.2%
18–249.2%
25–3410.6%
35–5423.2%
55–6414.9%
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.
Back to Overview