Data / Rankings / Median age on 1 July (US county estimates) / Counties in Pennsylvania

Counties in Pennsylvania by median age on 1 July (US county estimates)

Sullivan County had the highest median age on 1 July (US county estimates) of 67 counties in 2024, at 55.3 years. Centre County had the lowest, at 33.6 years. The median was 44.2 years. Source: the U.S. Census Bureau.

Highest55.3Sullivan County
Lowest33.6Centre County
Median44.267 counties

Top 40 counties, 2024

Sullivan County: 55.3 yearsSullivan County55.3Cameron County: 52.1 yearsCameron County52.1Potter County: 49.8 yearsPotter County49.8Wayne County: 49.1 yearsWayne County49.1Pike County: 49 yearsPike County49Elk County: 48.5 yearsElk County48.5Armstrong County: 47.6 yearsArmstrong County47.6Venango County: 47.4 yearsVenango County47.4Warren County: 47.4 yearsWarren County47.4Bedford County: 47.3 yearsBedford County47.3Susquehanna County: 47.3 yearsSusquehanna County47.3Westmoreland County: 47.3 yearsWestmoreland County47.3Somerset County: 47.1 yearsSomerset County47.1Clearfield County: 46.4 yearsClearfield County46.4Forest County: 46.3 yearsForest County46.3Carbon County: 46.2 yearsCarbon County46.2Fayette County: 46.1 yearsFayette County46.1Cambria County: 45.9 yearsCambria County45.9Fulton County: 45.6 yearsFulton County45.6Beaver County: 45.2 yearsBeaver County45.2Tioga County: 45.2 yearsTioga County45.2Lawrence County: 45.1 yearsLawrence County45.1Jefferson County: 45 yearsJefferson County45Mercer County: 44.9 yearsMercer County44.9Washington County: 44.9 yearsWashington County44.9Wyoming County: 44.9 yearsWyoming County44.9Adams County: 44.6 yearsAdams County44.6Bucks County: 44.6 yearsBucks County44.6Greene County: 44.6 yearsGreene County44.6Crawford County: 44.5 yearsCrawford County44.5Huntingdon County: 44.4 yearsHuntingdon County44.4Blair County: 44.3 yearsBlair County44.3Monroe County: 44.2 yearsMonroe County44.2Schuylkill County: 44.2 yearsSchuylkill County44.2Northumberland County: 44.1 yearsNorthumberland County44.1McKean County: 44 yearsMcKean County44Perry County: 43.9 yearsPerry County43.9Bradford County: 43.7 yearsBradford County43.7Butler County: 43.7 yearsButler County43.7Montour County: 43.6 yearsMontour County43.6
years. Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.

Full ranking

RankCounties2024
years		Change on 2023
1Sullivan County55.3+0.4
2Cameron County52.1+0.3
3Potter County49.8+0.2
4Wayne County49.10
5Pike County49+0.2
6Elk County48.50
7Armstrong County47.6+0.1
8Venango County47.4-0.2
8Warren County47.40
10Bedford County47.3-0.1
10Susquehanna County47.3-0.4
10Westmoreland County47.3-0.1
13Somerset County47.1-0.1
14Clearfield County46.4+0.1
15Forest County46.3-0.7
16Carbon County46.2-0.1
17Fayette County46.1+0.1
18Cambria County45.90
19Fulton County45.6+0.2
20Beaver County45.20
20Tioga County45.2+0.1
22Lawrence County45.10
23Jefferson County450
24Mercer County44.90
24Washington County44.9+0.1
24Wyoming County44.9+0.1
27Adams County44.6+0.4
27Bucks County44.6+0.1
27Greene County44.6+0.4
30Crawford County44.50
31Huntingdon County44.4+0.2
32Blair County44.3+0.1
33Monroe County44.2+0.4
33Schuylkill County44.2-0.2
35Northumberland County44.1-0.1
36McKean County440
37Perry County43.90
38Bradford County43.7+0.1
38Butler County43.7+0.2
40Montour County43.6+0.3
41Mifflin County43.3-0.1
42Clarion County42.90
42Juniata County42.9-0.1
44Luzerne County42.5-0.1
45Lackawanna County42.30
46Northampton County42.2+0.1
47Franklin County420
47Lebanon County42+0.1
49Lycoming County41.9+0.1
49Montgomery County41.9+0.2
51York County41.40
52Erie County41.1+0.2
53Chester County41+0.2
54Clinton County40.80
54Snyder County40.8+0.2
56Allegheny County40.7+0.1
57Columbia County40.6-0.1
57Indiana County40.6-0.4
59Cumberland County40.4+0.1
60Berks County40.20
61Lehigh County40.1+0.1
62Dauphin County39.70
63Delaware County39.6+0.2
63Lancaster County39.6+0.2
65Union County39.4-0.4
66Philadelphia County35.4+0.2
67Centre County33.6+0.6

Other periods

About this ranking

Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.

Counties only: the county file has no state or national medians, and medians cannot be added up. A single-year estimate, unlike median_age, which for US places is a five-year American Community Survey estimate.

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: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (Counties in Pennsylvania by median age on 1 July (US county estimates), 2024) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Pennsylvania by median age on 1 July (US county estimates), 2024. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2024. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Counties in Pennsylvania by median age on 1 July (US county estimates), 2024. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2024.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Pennsylvania by median age on 1 July (US county estimates), 2024 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_pennsylvania_by_2024,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Pennsylvania by median age on 1 July (US county estimates), 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2024. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Pennsylvania by median age on 1 July (US county estimates), 2024
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2024.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest median age on 1 July (US county estimates)?

Sullivan County, with 55.3 years in 2024, according to the U.S. Census Bureau.

Which county has the lowest median age on 1 July (US county estimates)?

Centre County, with 33.6 years in 2024.

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: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.

Median age on 1 July (US county estimates): other rankings

Counties in Pennsylvania: more rankings