Data / Rankings / Population under 18 / Counties in Pennsylvania

Counties in Pennsylvania by population under 18

Lancaster County had the highest population under 18 of 67 counties in 2014, at 24%. Forest County had the lowest, at 9.8%. The median was 20.4% and the figure for Pennsylvania was 21.1%. Source: the U.S. Census Bureau.

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Highest24Lancaster County
Lowest9.8Forest County
Median20.467 counties
Pennsylvania21.1History

Map of counties, 2014

Adams County: 21 %Allegheny County: 19 %Armstrong County: 19.7 %Beaver County: 19.6 %Bedford County: 20.7 %Berks County: 22.9 %Blair County: 20.4 %Bradford County: 22.2 %Bucks County: 21.4 %Butler County: 21.1 %Cambria County: 19.3 %Cameron County: 17.6 %Carbon County: 19.9 %Centre County: 15.4 %Chester County: 23.7 %Clarion County: 19.3 %Clearfield County: 18.8 %Clinton County: 20.8 %Columbia County: 18.1 %Crawford County: 21.4 %Cumberland County: 20.3 %Dauphin County: 22.2 %Delaware County: 22.5 %Elk County: 19.8 %Erie County: 21.9 %Fayette County: 19.4 %Forest County: 9.8 %Franklin County: 23.2 %Fulton County: 21.3 %Greene County: 19.1 %Huntingdon County: 19 %Indiana County: 18.5 %Jefferson County: 21.1 %Juniata County: 22.8 %Lackawanna County: 19.8 %Lancaster County: 24 %Lawrence County: 20 %Lebanon County: 23 %Lehigh County: 22.6 %Luzerne County: 19.4 %Lycoming County: 20.8 %McKean County: 20.5 %Mercer County: 20.4 %Mifflin County: 22.4 %Monroe County: 21.4 %Montgomery County: 22 %Montour County: 20.5 %Northampton County: 20.5 %Northumberland County: 20.1 %Perry County: 22.1 %Philadelphia County: 21.7 %Pike County: 20 %Potter County: 21.2 %Schuylkill County: 19.5 %Snyder County: 21.7 %Somerset County: 18.5 %Sullivan County: 15.5 %Susquehanna County: 19.7 %Tioga County: 19.9 %Union County: 18.5 %Venango County: 20.7 %Warren County: 19.7 %Washington County: 19.7 %Wayne County: 17.7 %Westmoreland County: 19 %Wyoming County: 20.5 %York County: 22.5 %
  • Under 19
  • 19 to 20
  • 20 to 21
  • 21 to 22
  • 22 and over
%, 2014. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2014

Lancaster County: 24 %Lancaster County24Chester County: 23.7 %Chester County23.7Franklin County: 23.2 %Franklin County23.2Lebanon County: 23 %Lebanon County23Berks County: 22.9 %Berks County22.9Juniata County: 22.8 %Juniata County22.8Lehigh County: 22.6 %Lehigh County22.6Delaware County: 22.5 %Delaware County22.5York County: 22.5 %York County22.5Mifflin County: 22.4 %Mifflin County22.4Dauphin County: 22.2 %Dauphin County22.2Bradford County: 22.2 %Bradford County22.2Perry County: 22.1 %Perry County22.1Montgomery County: 22 %Montgomery County22Erie County: 21.9 %Erie County21.9Snyder County: 21.7 %Snyder County21.7Philadelphia County: 21.7 %Philadelphia County21.7Bucks County: 21.4 %Bucks County21.4Crawford County: 21.4 %Crawford County21.4Monroe County: 21.4 %Monroe County21.4Fulton County: 21.3 %Fulton County21.3Potter County: 21.2 %Potter County21.2Jefferson County: 21.1 %Jefferson County21.1Butler County: 21.1 %Butler County21.1Adams County: 21 %Adams County21Clinton County: 20.8 %Clinton County20.8Lycoming County: 20.8 %Lycoming County20.8Bedford County: 20.7 %Bedford County20.7Venango County: 20.7 %Venango County20.7Northampton County: 20.5 %Northampton County20.5Wyoming County: 20.5 %Wyoming County20.5McKean County: 20.5 %McKean County20.5Montour County: 20.5 %Montour County20.5Mercer County: 20.4 %Mercer County20.4Blair County: 20.4 %Blair County20.4Cumberland County: 20.3 %Cumberland County20.3Northumberland County: 20.1 %Northumberland County20.1Lawrence County: 20 %Lawrence County20Pike County: 20 %Pike County20Carbon County: 19.9 %Carbon County19.9Lancaster County: 24 %Lancaster County24Chester County: 23.7 %Chester County23.7Franklin County: 23.2 %Franklin County23.2Lebanon County: 23 %Lebanon County23Berks County: 22.9 %Berks County22.9Juniata County: 22.8 %Juniata County22.8Lehigh County: 22.6 %Lehigh County22.6Delaware County: 22.5 %Delaware County22.5York County: 22.5 %York County22.5Mifflin County: 22.4 %Mifflin County22.4Dauphin County: 22.2 %Dauphin County22.2Bradford County: 22.2 %Bradford County22.2Perry County: 22.1 %Perry County22.1Montgomery County: 22 %Montgomery County22Erie County: 21.9 %Erie County21.9Snyder County: 21.7 %Snyder County21.7Philadelphia County: 21.7 %Philadelphia County21.7Bucks County: 21.4 %Bucks County21.4Crawford County: 21.4 %Crawford County21.4Monroe County: 21.4 %Monroe County21.4Fulton County: 21.3 %Fulton County21.3Potter County: 21.2 %Potter County21.2Jefferson County: 21.1 %Jefferson County21.1Butler County: 21.1 %Butler County21.1Adams County: 21 %Adams County21Clinton County: 20.8 %Clinton County20.8Lycoming County: 20.8 %Lycoming County20.8Bedford County: 20.7 %Bedford County20.7Venango County: 20.7 %Venango County20.7Northampton County: 20.5 %Northampton County20.5Wyoming County: 20.5 %Wyoming County20.5McKean County: 20.5 %McKean County20.5Montour County: 20.5 %Montour County20.5Mercer County: 20.4 %Mercer County20.4Blair County: 20.4 %Blair County20.4Cumberland County: 20.3 %Cumberland County20.3Northumberland County: 20.1 %Northumberland County20.1Lawrence County: 20 %Lawrence County20Pike County: 20 %Pike County20Carbon County: 19.9 %Carbon County19.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1Lancaster County24-0.2 pts
2Chester County23.7-0.2 pts
3Franklin County23.2-0.1 pts
4Lebanon County230 pts
5Berks County22.9-0.1 pts
6Juniata County22.8-0.3 pts
7Lehigh County22.6-0.1 pts
8Delaware County22.5-0.1 pts
9York County22.5-0.2 pts
10Mifflin County22.4-0.1 pts
11Dauphin County22.2-0.2 pts
12Bradford County22.2-0.1 pts
13Perry County22.1-0.1 pts
14Montgomery County22-0.1 pts
15Erie County21.9-0.1 pts
16Snyder County21.7-0.1 pts
17Philadelphia County21.7-0.1 pts
18Bucks County21.4-0.3 pts
19Crawford County21.4-0.2 pts
20Monroe County21.4-0.5 pts
21Fulton County21.3-0.2 pts
22Potter County21.2-0.4 pts
23Jefferson County21.1-0.1 pts
24Butler County21.1-0.3 pts
25Adams County21-0.2 pts
26Clinton County20.8-0.1 pts
27Lycoming County20.8+0.2 pts
28Bedford County20.7-0.2 pts
29Venango County20.7-0.2 pts
30Northampton County20.5-0.2 pts
31Wyoming County20.5-0.2 pts
32McKean County20.5-0.1 pts
33Montour County20.5-0.2 pts
34Mercer County20.4-0.2 pts
35Blair County20.4-0.1 pts
36Cumberland County20.3-0 pts
37Northumberland County20.1-0.1 pts
38Lawrence County20-0.3 pts
39Pike County20-0.8 pts
40Carbon County19.9-0.3 pts
40Tioga County19.9-0.2 pts
42Lackawanna County19.8-0.1 pts
43Elk County19.8-0.2 pts
44Susquehanna County19.7-0.2 pts
45Washington County19.7-0.2 pts
46Armstrong County19.7-0.2 pts
47Warren County19.7-0.2 pts
48Beaver County19.6-0.2 pts
49Schuylkill County19.5-0.1 pts
50Luzerne County19.4-0.1 pts
51Fayette County19.4-0.2 pts
52Clarion County19.3-0 pts
53Cambria County19.3-0.1 pts
54Greene County19.1-0.1 pts
55Huntingdon County19-0.2 pts
56Westmoreland County19-0.2 pts
57Allegheny County19-0.1 pts
58Clearfield County18.8-0.3 pts
59Indiana County18.5-0.1 pts
60Somerset County18.5-0.1 pts
61Union County18.50 pts
62Columbia County18.1-0.1 pts
63Wayne County17.7-0.3 pts
64Cameron County17.6-0.4 pts
65Sullivan County15.5+0.2 pts
66Centre County15.4-0.1 pts
67Forest County9.8-0.5 pts

Other periods

About this ranking

Residents aged 0 to 17 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.

Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.

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 0 to 17 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 0 to 17 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 under 18, 2014) [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 0 to 17 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 under 18, 2014. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-under-18/pennsylvania-counties?period=2014. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014. 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-under-18/pennsylvania-counties?period=2014.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/pennsylvania-counties?period=2014 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_pennsylvania_by_2014,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014}},
  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-under-18/pennsylvania-counties?period=2014. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 0 to 17 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 under 18, 2014
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-under-18/pennsylvania-counties?period=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/pennsylvania-counties?period=2014.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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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Rank Counties in Pennsylvania by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

Lancaster County, with 24% in 2014, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Forest County, with 9.8% in 2014.

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 0 to 17 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 under 18: other rankings

Counties in Pennsylvania: more rankings