Data / Rankings / Median age / Counties in Pennsylvania

Counties in Pennsylvania by median age

Sullivan County had the highest median age of 67 counties in 2021, at 54.5 years. Centre County had the lowest, at 33.5 years. The median was 43.4 years and the figure for Pennsylvania was 40.8 years. Source: the U.S. Census Bureau.

Highest54.5Sullivan County
Lowest33.5Centre County
Median43.467 counties
Pennsylvania40.8History

Top 40 counties, 2021

CSVChart (SVG)

Sullivan CountySullivan County: 54.5 years54.5Cameron CountyCameron County: 51.8 years51.8Forest CountyForest County: 49.6 years49.6Pike CountyPike County: 48.6 years48.6Susquehanna CountySusquehanna County: 48.6 years48.6Wayne CountyWayne County: 48.4 years48.4Elk CountyElk County: 48.1 years48.1Potter CountyPotter County: 47.7 years47.7Venango CountyVenango County: 47.4 years47.4Bedford CountyBedford County: 47.2 years47.2Warren CountyWarren County: 47.1 years47.1Westmoreland CountyWestmoreland County: 47.1 years47.1Armstrong CountyArmstrong County: 47 years47Carbon CountyCarbon County: 46.2 years46.2Somerset CountySomerset County: 46.2 years46.2Fulton CountyFulton County: 45.7 years45.7Cambria CountyCambria County: 45.5 years45.5Clearfield CountyClearfield County: 45.2 years45.2Wyoming CountyWyoming County: 45.2 years45.2Fayette CountyFayette County: 45.1 years45.1Lawrence CountyLawrence County: 45 years45Tioga CountyTioga County: 45 years45Beaver CountyBeaver County: 44.9 years44.9Mercer CountyMercer County: 44.8 years44.8Northumberland CountyNorthumberland County: 44.4 years44.4Washington CountyWashington County: 44.2 years44.2Schuylkill CountySchuylkill County: 44.1 years44.1Adams CountyAdams County: 44 years44Bradford CountyBradford County: 44 years44Bucks CountyBucks County: 44 years44Jefferson CountyJefferson County: 43.6 years43.6Mifflin CountyMifflin County: 43.6 years43.6McKean CountyMcKean County: 43.5 years43.5Blair CountyBlair County: 43.4 years43.4Huntingdon CountyHuntingdon County: 43.4 years43.4Butler CountyButler County: 43.3 years43.3Crawford CountyCrawford County: 43.3 years43.3Monroe CountyMonroe County: 43.3 years43.3Perry CountyPerry County: 43.3 years43.3Montour CountyMontour County: 43.1 years43.1
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2021
years
1Sullivan County54.5
2Cameron County51.8
3Forest County49.6
4Pike County48.6
4Susquehanna County48.6
6Wayne County48.4
7Elk County48.1
8Potter County47.7
9Venango County47.4
10Bedford County47.2
11Warren County47.1
11Westmoreland County47.1
13Armstrong County47
14Carbon County46.2
14Somerset County46.2
16Fulton County45.7
17Cambria County45.5
18Clearfield County45.2
18Wyoming County45.2
20Fayette County45.1
21Lawrence County45
21Tioga County45
23Beaver County44.9
24Mercer County44.8
25Northumberland County44.4
26Washington County44.2
27Schuylkill County44.1
28Adams County44
28Bradford County44
28Bucks County44
31Jefferson County43.6
31Mifflin County43.6
33McKean County43.5
34Blair County43.4
34Huntingdon County43.4
36Butler County43.3
36Crawford County43.3
36Monroe County43.3
36Perry County43.3
40Montour County43.1
41Greene County42.7
42Juniata County42.6
43Luzerne County42.4
44Lackawanna County42.1
44Northampton County42.1
46Franklin County41.8
47Clarion County41.6
48Columbia County41.5
49Lycoming County41.2
49Montgomery County41.2
51Lebanon County40.8
51York County40.8
53Allegheny County40.7
54Chester County40.6
55Cumberland County40.5
56Snyder County40.3
57Indiana County40.1
58Berks County40
59Erie County39.9
60Clinton County39.7
61Union County39.6
62Dauphin County39.5
63Delaware County39
64Lehigh County38.8
65Lancaster County38.7
66Philadelphia County34.8
67Centre County33.5

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

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. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Sullivan County, with 54.5 years in 2021, according to the U.S. Census Bureau.

Which county has the lowest median age?

Centre County, with 33.5 years in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Pennsylvania: more rankings