Data / Rankings / Population aged 65 and over / Counties in Pennsylvania

Counties in Pennsylvania by share of population aged 65 and over, 2025

Sullivan County had the highest share of population aged 65 and over of 67 counties in 2025, at 34.8%. Philadelphia County had the lowest, at 15.9%. The median was 23.6% and the figure for Pennsylvania was 21.4%. Source: the U.S. Census Bureau.

Highest34.8Sullivan County
Lowest15.9Philadelphia County
Median23.667 counties
Pennsylvania21.4History

Top 40 counties, 2025

CSVChart (SVG)

Sullivan CountySullivan County: 34.8 %34.8Cameron CountyCameron County: 31.3 %31.3Potter CountyPotter County: 28.8 %28.8Wayne CountyWayne County: 27.2 %27.2Venango CountyVenango County: 27.2 %27.2Susquehanna CountySusquehanna County: 26.8 %26.8Westmoreland CountyWestmoreland County: 26.7 %26.7Elk CountyElk County: 26.5 %26.5Bedford CountyBedford County: 26.4 %26.4Warren CountyWarren County: 26.4 %26.4Somerset CountySomerset County: 26.4 %26.4Armstrong CountyArmstrong County: 26.3 %26.3Cambria CountyCambria County: 26.2 %26.2Pike CountyPike County: 26.1 %26.1Forest CountyForest County: 25.8 %25.8Tioga CountyTioga County: 25.6 %25.6Montour CountyMontour County: 25.5 %25.5Lawrence CountyLawrence County: 25.4 %25.4Mercer CountyMercer County: 25.3 %25.3Fayette CountyFayette County: 25.1 %25.1Jefferson CountyJefferson County: 25 %25Beaver CountyBeaver County: 24.8 %24.8Crawford CountyCrawford County: 24.7 %24.7Adams CountyAdams County: 24.7 %24.7Clearfield CountyClearfield County: 24.6 %24.6Huntingdon CountyHuntingdon County: 24.6 %24.6Blair CountyBlair County: 24.5 %24.5Washington CountyWashington County: 24.4 %24.4Fulton CountyFulton County: 24.4 %24.4Carbon CountyCarbon County: 24.3 %24.3Wyoming CountyWyoming County: 24.3 %24.3Bradford CountyBradford County: 23.7 %23.7Greene CountyGreene County: 23.7 %23.7Northumberland CountyNorthumberland County: 23.6 %23.6Clarion CountyClarion County: 23.4 %23.4Mifflin CountyMifflin County: 23.3 %23.3McKean CountyMcKean County: 23.3 %23.3Butler CountyButler County: 23.2 %23.2Bucks CountyBucks County: 23.1 %23.1Schuylkill CountySchuylkill County: 23 %23
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025 (%)Change on 2024
1Sullivan County34.8+1.3 pts
2Cameron County31.3+1.1 pts
3Potter County28.8+0.7 pts
4Wayne County27.2+0.5 pts
5Venango County27.2+0.7 pts
6Susquehanna County26.8+0.4 pts
7Westmoreland County26.7+0.6 pts
8Elk County26.5+0.7 pts
9Bedford County26.4+0.8 pts
10Warren County26.4+0.4 pts
11Somerset County26.4+0.6 pts
12Armstrong County26.3+0.5 pts
13Cambria County26.2+0.5 pts
14Pike County26.1+0.9 pts
15Forest County25.8+0.2 pts
16Tioga County25.6+0.5 pts
17Montour County25.5+0.5 pts
18Lawrence County25.4+0.5 pts
19Mercer County25.3+0.4 pts
20Fayette County25.1+0.5 pts
21Jefferson County25+0.5 pts
22Beaver County24.8+0.5 pts
23Crawford County24.7+0.4 pts
24Adams County24.7+0.7 pts
25Clearfield County24.6+0.5 pts
26Huntingdon County24.6+0.7 pts
27Blair County24.5+0.4 pts
28Washington County24.4+0.5 pts
29Fulton County24.4+0.6 pts
30Carbon County24.3+0.4 pts
31Wyoming County24.3+0.5 pts
32Bradford County23.7+0.4 pts
33Greene County23.7+0.5 pts
34Northumberland County23.6+0.3 pts
35Clarion County23.4+0.2 pts
36Mifflin County23.3+0.2 pts
37McKean County23.3+0.4 pts
38Butler County23.2+0.7 pts
39Bucks County23.1+0.7 pts
40Schuylkill County23+0.2 pts
41Lycoming County22.9+0.5 pts
42Indiana County22.8+0.4 pts
43Perry County22.8+0.4 pts
44Juniata County22.6+0.4 pts
45Lebanon County22.6+0.4 pts
46Clinton County22.4+0.2 pts
47Lackawanna County22.3+0.3 pts
48Northampton County22.2+0.5 pts
49Snyder County22.2+0.6 pts
50Franklin County22.1+0.3 pts
51Columbia County22+0.3 pts
52Erie County21.9+0.5 pts
53Allegheny County21.9+0.4 pts
54Monroe County21.7+0.8 pts
55Luzerne County21.7+0.3 pts
56Lancaster County21.6+0.5 pts
57Montgomery County21.2+0.5 pts
58Union County21+0.5 pts
59Cumberland County20.9+0.4 pts
60York County20.5+0.4 pts
61Berks County20+0.4 pts
62Chester County19.8+0.5 pts
63Lehigh County19.8+0.4 pts
64Dauphin County19.7+0.5 pts
65Delaware County19.6+0.5 pts
66Centre County17.6+0.6 pts
67Philadelphia County15.9+0.3 pts

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Pennsylvania by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"Pennsylvania","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=Pennsylvania&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest share of population aged 65 and over?

Sullivan County, with 34.8% in 2025, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Philadelphia County, with 15.9% in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in Pennsylvania: more rankings