Data / Rankings / Population aged 18 to 64 / Counties in Pennsylvania

Counties in Pennsylvania by population aged 18 to 64

Centre County had the highest population aged 18 to 64 of 67 counties in 2024, at 68.6%. Cameron County had the lowest, at 52.5%. The median was 57.2% and the figure for Pennsylvania was 59.2%. Source: the U.S. Census Bureau.

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Highest68.6Centre County
Lowest52.5Cameron County
Median57.267 counties
Pennsylvania59.2History

Map of counties, 2024

Adams County: 57.2 %Allegheny County: 60.6 %Armstrong County: 55.8 %Beaver County: 57.1 %Bedford County: 54.9 %Berks County: 58.9 %Blair County: 56.4 %Bradford County: 55 %Bucks County: 58.1 %Butler County: 58.9 %Cambria County: 55.7 %Cameron County: 52.5 %Carbon County: 57.5 %Centre County: 68.6 %Chester County: 59.2 %Clarion County: 57.3 %Clearfield County: 58.2 %Clinton County: 57.8 %Columbia County: 61 %Crawford County: 55.3 %Cumberland County: 59.2 %Dauphin County: 59.4 %Delaware County: 59.2 %Elk County: 56.1 %Erie County: 58.7 %Fayette County: 56.6 %Forest County: 66.2 %Franklin County: 56.5 %Fulton County: 56.1 %Greene County: 58.7 %Huntingdon County: 58.1 %Indiana County: 59.3 %Jefferson County: 54.9 %Juniata County: 55.7 %Lackawanna County: 58.3 %Lancaster County: 56.3 %Lawrence County: 55.7 %Lebanon County: 56 %Lehigh County: 59.1 %Luzerne County: 58.7 %Lycoming County: 57.5 %McKean County: 58.2 %Mercer County: 56.1 %Mifflin County: 54.7 %Monroe County: 60 %Montgomery County: 58.9 %Montour County: 55.2 %Northampton County: 59.9 %Northumberland County: 56.8 %Perry County: 56.4 %Philadelphia County: 64.4 %Pike County: 57.2 %Potter County: 52.7 %Schuylkill County: 57.8 %Snyder County: 57.5 %Somerset County: 56.3 %Sullivan County: 52.8 %Susquehanna County: 54.1 %Tioga County: 55.5 %Union County: 62.1 %Venango County: 54 %Warren County: 54.5 %Washington County: 57.2 %Wayne County: 56.8 %Westmoreland County: 56.1 %Wyoming County: 57.6 %York County: 58.5 %
  • Under 55
  • 55 to 56
  • 56 to 57
  • 57 to 58
  • 58 to 59
  • 59 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Centre County: 68.6 %Centre County68.6Forest County: 66.2 %Forest County66.2Philadelphia County: 64.4 %Philadelphia County64.4Union County: 62.1 %Union County62.1Columbia County: 61 %Columbia County61Allegheny County: 60.6 %Allegheny County60.6Monroe County: 60 %Monroe County60Northampton County: 59.9 %Northampton County59.9Dauphin County: 59.4 %Dauphin County59.4Indiana County: 59.3 %Indiana County59.3Chester County: 59.2 %Chester County59.2Cumberland County: 59.2 %Cumberland County59.2Delaware County: 59.2 %Delaware County59.2Lehigh County: 59.1 %Lehigh County59.1Butler County: 58.9 %Butler County58.9Berks County: 58.9 %Berks County58.9Montgomery County: 58.9 %Montgomery County58.9Erie County: 58.7 %Erie County58.7Luzerne County: 58.7 %Luzerne County58.7Greene County: 58.7 %Greene County58.7York County: 58.5 %York County58.5Lackawanna County: 58.3 %Lackawanna County58.3Clearfield County: 58.2 %Clearfield County58.2McKean County: 58.2 %McKean County58.2Huntingdon County: 58.1 %Huntingdon County58.1Bucks County: 58.1 %Bucks County58.1Schuylkill County: 57.8 %Schuylkill County57.8Clinton County: 57.8 %Clinton County57.8Wyoming County: 57.6 %Wyoming County57.6Lycoming County: 57.5 %Lycoming County57.5Carbon County: 57.5 %Carbon County57.5Snyder County: 57.5 %Snyder County57.5Clarion County: 57.3 %Clarion County57.3Pike County: 57.2 %Pike County57.2Adams County: 57.2 %Adams County57.2Washington County: 57.2 %Washington County57.2Beaver County: 57.1 %Beaver County57.1Northumberland County: 56.8 %Northumberland County56.8Wayne County: 56.8 %Wayne County56.8Fayette County: 56.6 %Fayette County56.6Centre County: 68.6 %Centre County68.6Forest County: 66.2 %Forest County66.2Philadelphia County: 64.4 %Philadelphia County64.4Union County: 62.1 %Union County62.1Columbia County: 61 %Columbia County61Allegheny County: 60.6 %Allegheny County60.6Monroe County: 60 %Monroe County60Northampton County: 59.9 %Northampton County59.9Dauphin County: 59.4 %Dauphin County59.4Indiana County: 59.3 %Indiana County59.3Chester County: 59.2 %Chester County59.2Cumberland County: 59.2 %Cumberland County59.2Delaware County: 59.2 %Delaware County59.2Lehigh County: 59.1 %Lehigh County59.1Butler County: 58.9 %Butler County58.9Berks County: 58.9 %Berks County58.9Montgomery County: 58.9 %Montgomery County58.9Erie County: 58.7 %Erie County58.7Luzerne County: 58.7 %Luzerne County58.7Greene County: 58.7 %Greene County58.7York County: 58.5 %York County58.5Lackawanna County: 58.3 %Lackawanna County58.3Clearfield County: 58.2 %Clearfield County58.2McKean County: 58.2 %McKean County58.2Huntingdon County: 58.1 %Huntingdon County58.1Bucks County: 58.1 %Bucks County58.1Schuylkill County: 57.8 %Schuylkill County57.8Clinton County: 57.8 %Clinton County57.8Wyoming County: 57.6 %Wyoming County57.6Lycoming County: 57.5 %Lycoming County57.5Carbon County: 57.5 %Carbon County57.5Snyder County: 57.5 %Snyder County57.5Clarion County: 57.3 %Clarion County57.3Pike County: 57.2 %Pike County57.2Adams County: 57.2 %Adams County57.2Washington County: 57.2 %Washington County57.2Beaver County: 57.1 %Beaver County57.1Northumberland County: 56.8 %Northumberland County56.8Wayne County: 56.8 %Wayne County56.8Fayette County: 56.6 %Fayette County56.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Centre County68.6-0.3 pts
2Forest County66.2+0.4 pts
3Philadelphia County64.4-0.1 pts
4Union County62.1+0.3 pts
5Columbia County61-0.2 pts
6Allegheny County60.6-0.4 pts
7Monroe County60-0.5 pts
8Northampton County59.9-0.3 pts
9Dauphin County59.4-0.2 pts
10Indiana County59.3-0.3 pts
11Chester County59.2-0.2 pts
12Cumberland County59.2-0.3 pts
12Delaware County59.2-0.4 pts
14Lehigh County59.1-0.2 pts
15Butler County58.9-0.4 pts
16Berks County58.9-0.3 pts
17Montgomery County58.9-0.3 pts
18Erie County58.7-0.3 pts
18Luzerne County58.7-0.3 pts
20Greene County58.7-0.6 pts
21York County58.5-0.2 pts
22Lackawanna County58.3-0.3 pts
23Clearfield County58.2-0.4 pts
24McKean County58.2-0.3 pts
25Huntingdon County58.1-0.4 pts
26Bucks County58.1-0.5 pts
27Schuylkill County57.8-0.3 pts
28Clinton County57.80 pts
29Wyoming County57.6-0.3 pts
30Lycoming County57.5-0.4 pts
31Carbon County57.5-0.3 pts
32Snyder County57.5-0.2 pts
33Clarion County57.3-0.5 pts
34Pike County57.2-0.5 pts
35Adams County57.2-0.5 pts
36Washington County57.2-0.4 pts
37Beaver County57.1-0.4 pts
38Northumberland County56.8-0.3 pts
39Wayne County56.8-0.7 pts
40Fayette County56.6-0.4 pts
41Franklin County56.5-0.1 pts
42Blair County56.4-0.2 pts
43Perry County56.4-0.3 pts
44Lancaster County56.3-0.3 pts
45Somerset County56.3-0.5 pts
46Westmoreland County56.1-0.4 pts
47Mercer County56.1-0.5 pts
48Fulton County56.1-0.2 pts
49Elk County56.1-0.5 pts
50Lebanon County56-0.2 pts
51Armstrong County55.8-0.6 pts
52Lawrence County55.7-0.5 pts
53Cambria County55.7-0.4 pts
54Juniata County55.7-0.5 pts
55Tioga County55.5-0.5 pts
56Crawford County55.3-0.4 pts
57Montour County55.2-0.7 pts
58Bradford County55-0.4 pts
59Jefferson County54.9-0.5 pts
60Bedford County54.9-0.7 pts
61Mifflin County54.7-0.2 pts
62Warren County54.5-0.6 pts
63Susquehanna County54.1-0.8 pts
64Venango County54-0.4 pts
65Sullivan County52.8-0.5 pts
66Potter County52.7-0.2 pts
67Cameron County52.5-0.6 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. 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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Pennsylvania by population aged 18 to 64, 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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Pennsylvania by population aged 18 to 64, 2024. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Pennsylvania by population aged 18 to 64, 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/population-18-64/pennsylvania-counties?period=2024.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Pennsylvania by population aged 18 to 64, 2024 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Pennsylvania by population aged 18 to 64, 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/population-18-64/pennsylvania-counties?period=2024. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. 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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Pennsylvania by population aged 18 to 64, 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/population-18-64/pennsylvania-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/pennsylvania-counties?period=2024.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. 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 population aged 18 to 64?

Centre County, with 68.6% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Cameron County, with 52.5% 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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in Pennsylvania: more rankings