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 2017, at 51.7 years. Centre County had the lowest, at 30.3 years. The median was 43.6 years. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest51.7Sullivan County
Lowest30.3Centre County
Median43.667 counties

Map of counties, 2017

Adams County: 44.1 yearsAllegheny County: 40.4 yearsArmstrong County: 46.6 yearsBeaver County: 45.5 yearsBedford County: 46.6 yearsBerks County: 40.1 yearsBlair County: 43.7 yearsBradford County: 44.3 yearsBucks County: 44 yearsButler County: 43.2 yearsCambria County: 45.5 yearsCameron County: 50.8 yearsCarbon County: 46.3 yearsCentre County: 30.3 yearsChester County: 40.2 yearsClarion County: 42.6 yearsClearfield County: 45.3 yearsClinton County: 40.6 yearsColumbia County: 41.5 yearsCrawford County: 43.6 yearsCumberland County: 40.8 yearsDauphin County: 39.7 yearsDelaware County: 39.1 yearsElk County: 47.5 yearsErie County: 39.8 yearsFayette County: 45.6 yearsForest County: 44.2 yearsFranklin County: 41.9 yearsFulton County: 45.4 yearsGreene County: 42.8 yearsHuntingdon County: 43.6 yearsIndiana County: 40.8 yearsJefferson County: 44.6 yearsJuniata County: 43.1 yearsLackawanna County: 42.6 yearsLancaster County: 38.8 yearsLawrence County: 45.5 yearsLebanon County: 41.7 yearsLehigh County: 39.6 yearsLuzerne County: 43.5 yearsLycoming County: 41.9 yearsMcKean County: 43.5 yearsMercer County: 44.6 yearsMifflin County: 44 yearsMonroe County: 42.8 yearsMontgomery County: 41.3 yearsMontour County: 43.5 yearsNorthampton County: 42.4 yearsNorthumberland County: 44.4 yearsPerry County: 43.3 yearsPhiladelphia County: 34.3 yearsPike County: 47.8 yearsPotter County: 47.5 yearsSchuylkill County: 45.2 yearsSnyder County: 40.1 yearsSomerset County: 46.3 yearsSullivan County: 51.7 yearsSusquehanna County: 47.7 yearsTioga County: 44.7 yearsUnion County: 39.1 yearsVenango County: 46.6 yearsWarren County: 47.2 yearsWashington County: 45 yearsWayne County: 48.3 yearsWestmoreland County: 47.1 yearsWyoming County: 44.7 yearsYork County: 41.2 years
  • Under 40
  • 40 to 43
  • 43 to 44
  • 44 to 45
  • 45 to 47
  • 47 and over
years, 2017. 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. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Sullivan County: 51.7 yearsSullivan County51.7Cameron County: 50.8 yearsCameron County50.8Wayne County: 48.3 yearsWayne County48.3Pike County: 47.8 yearsPike County47.8Susquehanna County: 47.7 yearsSusquehanna County47.7Elk County: 47.5 yearsElk County47.5Potter County: 47.5 yearsPotter County47.5Warren County: 47.2 yearsWarren County47.2Westmoreland County: 47.1 yearsWestmoreland County47.1Armstrong County: 46.6 yearsArmstrong County46.6Bedford County: 46.6 yearsBedford County46.6Venango County: 46.6 yearsVenango County46.6Carbon County: 46.3 yearsCarbon County46.3Somerset County: 46.3 yearsSomerset County46.3Fayette County: 45.6 yearsFayette County45.6Beaver County: 45.5 yearsBeaver County45.5Cambria County: 45.5 yearsCambria County45.5Lawrence County: 45.5 yearsLawrence County45.5Fulton County: 45.4 yearsFulton County45.4Clearfield County: 45.3 yearsClearfield County45.3Schuylkill County: 45.2 yearsSchuylkill County45.2Washington County: 45 yearsWashington County45Tioga County: 44.7 yearsTioga County44.7Wyoming County: 44.7 yearsWyoming County44.7Jefferson County: 44.6 yearsJefferson County44.6Mercer County: 44.6 yearsMercer County44.6Northumberland County: 44.4 yearsNorthumberland County44.4Bradford County: 44.3 yearsBradford County44.3Forest County: 44.2 yearsForest County44.2Adams County: 44.1 yearsAdams County44.1Bucks County: 44 yearsBucks County44Mifflin County: 44 yearsMifflin County44Blair County: 43.7 yearsBlair County43.7Crawford County: 43.6 yearsCrawford County43.6Huntingdon County: 43.6 yearsHuntingdon County43.6Luzerne County: 43.5 yearsLuzerne County43.5McKean County: 43.5 yearsMcKean County43.5Montour County: 43.5 yearsMontour County43.5Perry County: 43.3 yearsPerry County43.3Butler County: 43.2 yearsButler County43.2Sullivan County: 51.7 yearsSullivan County51.7Cameron County: 50.8 yearsCameron County50.8Wayne County: 48.3 yearsWayne County48.3Pike County: 47.8 yearsPike County47.8Susquehanna County: 47.7 yearsSusquehanna County47.7Elk County: 47.5 yearsElk County47.5Potter County: 47.5 yearsPotter County47.5Warren County: 47.2 yearsWarren County47.2Westmoreland County: 47.1 yearsWestmoreland County47.1Armstrong County: 46.6 yearsArmstrong County46.6Bedford County: 46.6 yearsBedford County46.6Venango County: 46.6 yearsVenango County46.6Carbon County: 46.3 yearsCarbon County46.3Somerset County: 46.3 yearsSomerset County46.3Fayette County: 45.6 yearsFayette County45.6Beaver County: 45.5 yearsBeaver County45.5Cambria County: 45.5 yearsCambria County45.5Lawrence County: 45.5 yearsLawrence County45.5Fulton County: 45.4 yearsFulton County45.4Clearfield County: 45.3 yearsClearfield County45.3Schuylkill County: 45.2 yearsSchuylkill County45.2Washington County: 45 yearsWashington County45Tioga County: 44.7 yearsTioga County44.7Wyoming County: 44.7 yearsWyoming County44.7Jefferson County: 44.6 yearsJefferson County44.6Mercer County: 44.6 yearsMercer County44.6Northumberland County: 44.4 yearsNorthumberland County44.4Bradford County: 44.3 yearsBradford County44.3Forest County: 44.2 yearsForest County44.2Adams County: 44.1 yearsAdams County44.1Bucks County: 44 yearsBucks County44Mifflin County: 44 yearsMifflin County44Blair County: 43.7 yearsBlair County43.7Crawford County: 43.6 yearsCrawford County43.6Huntingdon County: 43.6 yearsHuntingdon County43.6Luzerne County: 43.5 yearsLuzerne County43.5McKean County: 43.5 yearsMcKean County43.5Montour County: 43.5 yearsMontour County43.5Perry County: 43.3 yearsPerry County43.3Butler County: 43.2 yearsButler County43.2
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

RankCounties2017
years		Change on 2016
1Sullivan County51.7+0.4
2Cameron County50.8-0.1
3Wayne County48.3+0.3
4Pike County47.8+0.2
5Susquehanna County47.7+0.3
6Elk County47.5+0.4
6Potter County47.5+0.4
8Warren County47.2+0.2
9Westmoreland County47.1+0.3
10Armstrong County46.6+0.3
10Bedford County46.6+0.3
10Venango County46.6+0.4
13Carbon County46.3+0.2
13Somerset County46.3+0.3
15Fayette County45.6+0.3
16Beaver County45.5+0.1
16Cambria County45.5+0.2
16Lawrence County45.5+0.2
19Fulton County45.4+0.4
20Clearfield County45.3+0.3
21Schuylkill County45.2+0.2
22Washington County45+0.2
23Tioga County44.7+0.7
23Wyoming County44.7+0.3
25Jefferson County44.6+0.2
25Mercer County44.6+0.2
27Northumberland County44.4+0.1
28Bradford County44.30
29Forest County44.2-0.2
30Adams County44.1+0.3
31Bucks County44+0.1
31Mifflin County440
33Blair County43.7+0.1
34Crawford County43.6+0.3
34Huntingdon County43.6+0.2
36Luzerne County43.5-0.1
36McKean County43.5+0.3
36Montour County43.5-0.5
39Perry County43.3+0.1
40Butler County43.20
41Juniata County43.1+0.1
42Greene County42.8+0.2
42Monroe County42.8-0.1
44Clarion County42.6-0.2
44Lackawanna County42.60
46Northampton County42.40
47Franklin County41.9+0.2
47Lycoming County41.9+0.2
49Lebanon County41.70
50Columbia County41.5+0.4
51Montgomery County41.30
52York County41.2-0.1
53Cumberland County40.80
53Indiana County40.8+0.2
55Clinton County40.6+0.5
56Allegheny County40.4-0.1
57Chester County40.2+0.1
58Berks County40.1+0.1
58Snyder County40.1-0.1
60Erie County39.8+0.3
61Dauphin County39.7-0.1
62Lehigh County39.60
63Delaware County39.1+0.1
63Union County39.1+0.2
65Lancaster County38.8+0.1
66Philadelphia County34.3+0.2
67Centre County30.3+0.3

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), 2017) [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), 2017. 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=2017. 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), 2017. 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=2017.

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), 2017 [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=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_pennsylvania_by_2017,
  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), 2017}},
  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=2017. 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), 2017
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=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2017.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

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 median age on 1 July (US county estimates) using official data, and cite the source.
rank_places {"indicator":"median_age_pep","level":"province","within":"Pennsylvania","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=median_age_pep&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 median age on 1 July (US county estimates)?

Sullivan County, with 51.7 years in 2017, according to the U.S. Census Bureau.

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

Centre County, with 30.3 years in 2017.

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