Data / Rankings / Population under 18 / Counties in Ohio

Counties in Ohio by population under 18

Holmes County had the highest population under 18 of 88 counties in 2016, at 32.4%. Athens County had the lowest, at 15.6%. The median was 23% and the figure for Ohio was 22.5%. Source: the U.S. Census Bureau.

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Highest32.4Holmes County
Lowest15.6Athens County
Median2388 counties
Ohio22.5History

Map of counties, 2016

Adams County: 24.3 %Allen County: 23.5 %Ashland County: 23 %Ashtabula County: 22.2 %Athens County: 15.6 %Auglaize County: 24.1 %Belmont County: 19.2 %Brown County: 23.1 %Butler County: 24 %Carroll County: 21.2 %Champaign County: 23.2 %Clark County: 22.8 %Clermont County: 23.9 %Clinton County: 23.2 %Columbiana County: 20.7 %Coshocton County: 24 %Crawford County: 21.6 %Cuyahoga County: 21 %Darke County: 23.8 %Defiance County: 23.4 %Delaware County: 27.8 %Erie County: 20.5 %Fairfield County: 24.4 %Fayette County: 23.7 %Franklin County: 23.3 %Fulton County: 24.2 %Gallia County: 23.2 %Geauga County: 23.5 %Greene County: 21 %Guernsey County: 22.1 %Hamilton County: 22.9 %Hancock County: 22.5 %Hardin County: 23 %Harrison County: 21.4 %Henry County: 23.6 %Highland County: 24.3 %Hocking County: 22.4 %Holmes County: 32.4 %Huron County: 24.1 %Jackson County: 23.9 %Jefferson County: 19.6 %Knox County: 23 %Lake County: 20.4 %Lawrence County: 22.4 %Licking County: 23.5 %Logan County: 23.3 %Lorain County: 22.4 %Lucas County: 22.8 %Madison County: 21.4 %Mahoning County: 20.1 %Marion County: 20.9 %Medina County: 23.1 %Meigs County: 22 %Mercer County: 25.4 %Miami County: 23.3 %Monroe County: 21 %Montgomery County: 22.2 %Morgan County: 21.5 %Morrow County: 24.3 %Muskingum County: 23 %Noble County: 18.8 %Ottawa County: 19.1 %Paulding County: 24 %Perry County: 24.2 %Pickaway County: 22.5 %Pike County: 24.1 %Portage County: 19.1 %Preble County: 23.1 %Putnam County: 25.6 %Richland County: 21.7 %Ross County: 21.4 %Sandusky County: 23.1 %Scioto County: 21.8 %Seneca County: 22.4 %Shelby County: 25.6 %Stark County: 21.8 %Summit County: 21.3 %Trumbull County: 20.5 %Tuscarawas County: 22.8 %Union County: 25.8 %Van Wert County: 23.6 %Vinton County: 22.7 %Warren County: 25.8 %Washington County: 20.1 %Wayne County: 24.4 %Williams County: 22.9 %Wood County: 20.8 %Wyandot County: 23.1 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2016. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2016

Holmes County: 32.4 %Holmes County32.4Delaware County: 27.8 %Delaware County27.8Union County: 25.8 %Union County25.8Warren County: 25.8 %Warren County25.8Shelby County: 25.6 %Shelby County25.6Putnam County: 25.6 %Putnam County25.6Mercer County: 25.4 %Mercer County25.4Fairfield County: 24.4 %Fairfield County24.4Wayne County: 24.4 %Wayne County24.4Highland County: 24.3 %Highland County24.3Morrow County: 24.3 %Morrow County24.3Adams County: 24.3 %Adams County24.3Perry County: 24.2 %Perry County24.2Fulton County: 24.2 %Fulton County24.2Auglaize County: 24.1 %Auglaize County24.1Huron County: 24.1 %Huron County24.1Pike County: 24.1 %Pike County24.1Paulding County: 24 %Paulding County24Butler County: 24 %Butler County24Coshocton County: 24 %Coshocton County24Jackson County: 23.9 %Jackson County23.9Clermont County: 23.9 %Clermont County23.9Darke County: 23.8 %Darke County23.8Fayette County: 23.7 %Fayette County23.7Van Wert County: 23.6 %Van Wert County23.6Henry County: 23.6 %Henry County23.6Allen County: 23.5 %Allen County23.5Geauga County: 23.5 %Geauga County23.5Licking County: 23.5 %Licking County23.5Defiance County: 23.4 %Defiance County23.4Logan County: 23.3 %Logan County23.3Miami County: 23.3 %Miami County23.3Franklin County: 23.3 %Franklin County23.3Clinton County: 23.2 %Clinton County23.2Champaign County: 23.2 %Champaign County23.2Gallia County: 23.2 %Gallia County23.2Brown County: 23.1 %Brown County23.1Wyandot County: 23.1 %Wyandot County23.1Preble County: 23.1 %Preble County23.1Medina County: 23.1 %Medina County23.1Holmes County: 32.4 %Holmes County32.4Delaware County: 27.8 %Delaware County27.8Union County: 25.8 %Union County25.8Warren County: 25.8 %Warren County25.8Shelby County: 25.6 %Shelby County25.6Putnam County: 25.6 %Putnam County25.6Mercer County: 25.4 %Mercer County25.4Fairfield County: 24.4 %Fairfield County24.4Wayne County: 24.4 %Wayne County24.4Highland County: 24.3 %Highland County24.3Morrow County: 24.3 %Morrow County24.3Adams County: 24.3 %Adams County24.3Perry County: 24.2 %Perry County24.2Fulton County: 24.2 %Fulton County24.2Auglaize County: 24.1 %Auglaize County24.1Huron County: 24.1 %Huron County24.1Pike County: 24.1 %Pike County24.1Paulding County: 24 %Paulding County24Butler County: 24 %Butler County24Coshocton County: 24 %Coshocton County24Jackson County: 23.9 %Jackson County23.9Clermont County: 23.9 %Clermont County23.9Darke County: 23.8 %Darke County23.8Fayette County: 23.7 %Fayette County23.7Van Wert County: 23.6 %Van Wert County23.6Henry County: 23.6 %Henry County23.6Allen County: 23.5 %Allen County23.5Geauga County: 23.5 %Geauga County23.5Licking County: 23.5 %Licking County23.5Defiance County: 23.4 %Defiance County23.4Logan County: 23.3 %Logan County23.3Miami County: 23.3 %Miami County23.3Franklin County: 23.3 %Franklin County23.3Clinton County: 23.2 %Clinton County23.2Champaign County: 23.2 %Champaign County23.2Gallia County: 23.2 %Gallia County23.2Brown County: 23.1 %Brown County23.1Wyandot County: 23.1 %Wyandot County23.1Preble County: 23.1 %Preble County23.1Medina County: 23.1 %Medina County23.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2016 (%)Change on 2015
1Holmes County32.4-0.5 pts
2Delaware County27.8-0.1 pts
3Union County25.8-0.1 pts
4Warren County25.8-0.3 pts
5Shelby County25.6-0.3 pts
6Putnam County25.60 pts
7Mercer County25.4-0.1 pts
8Fairfield County24.4-0.1 pts
9Wayne County24.4-0.1 pts
10Highland County24.3-0.2 pts
11Morrow County24.3-0.1 pts
12Adams County24.3-0.1 pts
13Perry County24.2-0.1 pts
14Fulton County24.2-0.1 pts
15Auglaize County24.1-0.2 pts
16Huron County24.1-0.3 pts
17Pike County24.1+0.1 pts
18Paulding County24-0 pts
19Butler County24-0.1 pts
20Coshocton County24+0.2 pts
21Jackson County23.9-0.2 pts
22Clermont County23.9-0.2 pts
23Darke County23.8-0.3 pts
24Fayette County23.7-0.2 pts
25Van Wert County23.6-0 pts
26Henry County23.6-0.2 pts
27Allen County23.50 pts
28Geauga County23.5-0.3 pts
29Licking County23.5-0.2 pts
30Defiance County23.4-0.2 pts
31Logan County23.3-0.2 pts
32Miami County23.3-0.1 pts
33Franklin County23.3-0.1 pts
34Clinton County23.2-0.2 pts
35Champaign County23.20 pts
36Gallia County23.2+0.1 pts
37Brown County23.1-0.1 pts
38Wyandot County23.1-0.3 pts
39Preble County23.1-0.1 pts
40Medina County23.1-0.3 pts
41Sandusky County23.1-0.1 pts
42Ashland County23-0.2 pts
43Hardin County23-0.1 pts
44Muskingum County23-0.2 pts
45Knox County23-0.3 pts
46Williams County22.9-0.1 pts
47Hamilton County22.9-0.1 pts
48Clark County22.80 pts
49Lucas County22.8-0.2 pts
50Tuscarawas County22.8-0.1 pts
51Vinton County22.7-0.2 pts
52Hancock County22.5-0.1 pts
53Pickaway County22.5-0.2 pts
54Seneca County22.4-0 pts
55Lorain County22.4-0.2 pts
56Hocking County22.4-0.5 pts
57Lawrence County22.4-0 pts
58Montgomery County22.2-0.1 pts
59Ashtabula County22.2-0.2 pts
60Guernsey County22.1-0.2 pts
61Meigs County220 pts
62Stark County21.8-0.1 pts
63Scioto County21.8-0.2 pts
64Richland County21.7-0 pts
65Crawford County21.6-0.2 pts
66Morgan County21.5-0.2 pts
67Ross County21.4-0.2 pts
68Harrison County21.4-0.1 pts
69Madison County21.4+0.1 pts
70Summit County21.3-0.2 pts
71Carroll County21.2-0.2 pts
72Monroe County21-0.1 pts
73Greene County21-0 pts
74Cuyahoga County21-0.2 pts
75Marion County20.9-0.1 pts
76Wood County20.8-0.1 pts
77Columbiana County20.7-0.1 pts
78Trumbull County20.5-0.2 pts
79Erie County20.5-0.2 pts
80Lake County20.4-0.3 pts
81Mahoning County20.1-0.2 pts
82Washington County20.1-0.1 pts
83Jefferson County19.6-0 pts
84Belmont County19.2-0.1 pts
85Portage County19.1-0.2 pts
86Ottawa County19.1-0.3 pts
87Noble County18.8+0.2 pts
88Athens County15.6-0.1 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 Ohio by population under 18, 2016) [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 Ohio by population under 18, 2016. 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/ohio-counties?period=2016. 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 Ohio by population under 18, 2016. 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/ohio-counties?period=2016.

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 Ohio by population under 18, 2016 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/ohio-counties?period=2016 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_ohio_by_2016,
  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 Ohio by population under 18, 2016}},
  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/ohio-counties?period=2016. 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 Ohio by population under 18, 2016
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/ohio-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/ohio-counties?period=2016.
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 Ohio by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

Holmes County, with 32.4% in 2016, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Athens County, with 15.6% in 2016.

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 Ohio: more rankings