Data / Rankings / Population under 18 / Counties in Maine

Counties in Maine by population under 18

Androscoggin County had the highest population under 18 of 16 counties in 2017, at 21.5%. Lincoln County had the lowest, at 16.4%. The median was 18.8% and the figure for Maine was 19%. Source: the U.S. Census Bureau.

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Highest21.5Androscoggin County
Lowest16.4Lincoln County
Median18.816 counties
Maine19History

Map of counties, 2017

Androscoggin County: 21.5 %Aroostook County: 18.8 %Cumberland County: 19.1 %Franklin County: 18.3 %Hancock County: 17.3 %Kennebec County: 19.2 %Knox County: 17.8 %Lincoln County: 16.4 %Oxford County: 19.5 %Penobscot County: 18.6 %Piscataquis County: 17.4 %Sagadahoc County: 18.9 %Somerset County: 19.6 %Waldo County: 19.1 %Washington County: 18.4 %York County: 18.9 %
  • Under 18
  • 18 to 19
  • 19 and over
%, 2017. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2017

Androscoggin County: 21.5 %Androscoggin County21.5Somerset County: 19.6 %Somerset County19.6Oxford County: 19.5 %Oxford County19.5Kennebec County: 19.2 %Kennebec County19.2Cumberland County: 19.1 %Cumberland County19.1Waldo County: 19.1 %Waldo County19.1Sagadahoc County: 18.9 %Sagadahoc County18.9York County: 18.9 %York County18.9Aroostook County: 18.8 %Aroostook County18.8Penobscot County: 18.6 %Penobscot County18.6Washington County: 18.4 %Washington County18.4Franklin County: 18.3 %Franklin County18.3Knox County: 17.8 %Knox County17.8Piscataquis County: 17.4 %Piscataquis County17.4Hancock County: 17.3 %Hancock County17.3Lincoln County: 16.4 %Lincoln County16.4Androscoggin County: 21.5 %Androscoggin County21.5Somerset County: 19.6 %Somerset County19.6Oxford County: 19.5 %Oxford County19.5Kennebec County: 19.2 %Kennebec County19.2Cumberland County: 19.1 %Cumberland County19.1Waldo County: 19.1 %Waldo County19.1Sagadahoc County: 18.9 %Sagadahoc County18.9York County: 18.9 %York County18.9Aroostook County: 18.8 %Aroostook County18.8Penobscot County: 18.6 %Penobscot County18.6Washington County: 18.4 %Washington County18.4Franklin County: 18.3 %Franklin County18.3Knox County: 17.8 %Knox County17.8Piscataquis County: 17.4 %Piscataquis County17.4Hancock County: 17.3 %Hancock County17.3Lincoln County: 16.4 %Lincoln County16.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Androscoggin County21.5-0 pts
2Somerset County19.6-0.1 pts
3Oxford County19.5-0.2 pts
4Kennebec County19.2-0.2 pts
5Cumberland County19.1-0.2 pts
6Waldo County19.1-0.1 pts
7Sagadahoc County18.9-0.2 pts
8York County18.9-0.3 pts
9Aroostook County18.8-0.1 pts
10Penobscot County18.6-0.1 pts
11Washington County18.4-0.1 pts
12Franklin County18.3-0.2 pts
13Knox County17.8-0.2 pts
14Piscataquis County17.4-0.1 pts
15Hancock County17.3-0.2 pts
16Lincoln County16.4-0.2 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 Maine by population under 18, 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: 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 Maine by population under 18, 2017. 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/maine-counties?period=2017. 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 Maine by population under 18, 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/population-under-18/maine-counties?period=2017.

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 Maine by population under 18, 2017 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/maine-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maine_by_2017,
  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 Maine by population under 18, 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/population-under-18/maine-counties?period=2017. 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 Maine by population under 18, 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/population-under-18/maine-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/maine-counties?period=2017.
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 Maine by population under 18 using official data, and cite the source.
rank_places {"indicator":"population_0_17_share","level":"province","within":"Maine","limit":10}
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Questions

Which county has the highest population under 18?

Androscoggin County, with 21.5% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Lincoln County, with 16.4% 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: 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 Maine: more rankings