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 2022, at 30.3%. Athens County had the lowest, at 15.4%. The median was 22.2% and the figure for Ohio was 21.8%. Source: the U.S. Census Bureau.

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Highest30.3Holmes County
Lowest15.4Athens County
Median22.288 counties
Ohio21.8History

Map of counties, 2022

Adams County: 24.1 %Allen County: 23.2 %Ashland County: 22.4 %Ashtabula County: 21.7 %Athens County: 15.4 %Auglaize County: 23.5 %Belmont County: 19.1 %Brown County: 22.7 %Butler County: 23.2 %Carroll County: 20.7 %Champaign County: 22.4 %Clark County: 22.3 %Clermont County: 22.3 %Clinton County: 22 %Columbiana County: 20.1 %Coshocton County: 24.3 %Crawford County: 21.2 %Cuyahoga County: 20.1 %Darke County: 23.6 %Defiance County: 22.8 %Delaware County: 25.3 %Erie County: 19.4 %Fairfield County: 24.1 %Fayette County: 23.3 %Franklin County: 22.9 %Fulton County: 23 %Gallia County: 23.5 %Geauga County: 22.1 %Greene County: 20.8 %Guernsey County: 21.7 %Hamilton County: 22.3 %Hancock County: 21.8 %Hardin County: 23.2 %Harrison County: 21.4 %Henry County: 23 %Highland County: 24 %Hocking County: 21.6 %Holmes County: 30.3 %Huron County: 23.3 %Jackson County: 23.8 %Jefferson County: 19.5 %Knox County: 22.8 %Lake County: 19 %Lawrence County: 21.9 %Licking County: 22.7 %Logan County: 22.2 %Lorain County: 21.4 %Lucas County: 22.4 %Madison County: 21 %Mahoning County: 19.8 %Marion County: 21.4 %Medina County: 21.4 %Meigs County: 21.1 %Mercer County: 25.7 %Miami County: 22.9 %Monroe County: 20.1 %Montgomery County: 21.7 %Morgan County: 20.9 %Morrow County: 22.3 %Muskingum County: 22.6 %Noble County: 19.1 %Ottawa County: 17.7 %Paulding County: 23.8 %Perry County: 23.7 %Pickaway County: 22.4 %Pike County: 24 %Portage County: 18.2 %Preble County: 22.3 %Putnam County: 25.3 %Richland County: 21.5 %Ross County: 21.1 %Sandusky County: 21.8 %Scioto County: 21.7 %Seneca County: 21.6 %Shelby County: 24.5 %Stark County: 21.3 %Summit County: 20.5 %Trumbull County: 20.1 %Tuscarawas County: 22.7 %Union County: 25 %Van Wert County: 23.7 %Vinton County: 21.8 %Warren County: 23.9 %Washington County: 19.6 %Wayne County: 23.7 %Williams County: 21.8 %Wood County: 20.5 %Wyandot County: 22.1 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2022. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2022

Holmes County: 30.3 %Holmes County30.3Mercer County: 25.7 %Mercer County25.7Delaware County: 25.3 %Delaware County25.3Putnam County: 25.3 %Putnam County25.3Union County: 25 %Union County25Shelby County: 24.5 %Shelby County24.5Coshocton County: 24.3 %Coshocton County24.3Fairfield County: 24.1 %Fairfield County24.1Adams County: 24.1 %Adams County24.1Highland County: 24 %Highland County24Pike County: 24 %Pike County24Warren County: 23.9 %Warren County23.9Paulding County: 23.8 %Paulding County23.8Jackson County: 23.8 %Jackson County23.8Wayne County: 23.7 %Wayne County23.7Van Wert County: 23.7 %Van Wert County23.7Perry County: 23.7 %Perry County23.7Darke County: 23.6 %Darke County23.6Gallia County: 23.5 %Gallia County23.5Auglaize County: 23.5 %Auglaize County23.5Huron County: 23.3 %Huron County23.3Fayette County: 23.3 %Fayette County23.3Allen County: 23.2 %Allen County23.2Hardin County: 23.2 %Hardin County23.2Butler County: 23.2 %Butler County23.2Henry County: 23 %Henry County23Fulton County: 23 %Fulton County23Miami County: 22.9 %Miami County22.9Franklin County: 22.9 %Franklin County22.9Defiance County: 22.8 %Defiance County22.8Knox County: 22.8 %Knox County22.8Licking County: 22.7 %Licking County22.7Tuscarawas County: 22.7 %Tuscarawas County22.7Brown County: 22.7 %Brown County22.7Muskingum County: 22.6 %Muskingum County22.6Lucas County: 22.4 %Lucas County22.4Pickaway County: 22.4 %Pickaway County22.4Champaign County: 22.4 %Champaign County22.4Ashland County: 22.4 %Ashland County22.4Morrow County: 22.3 %Morrow County22.3Holmes County: 30.3 %Holmes County30.3Mercer County: 25.7 %Mercer County25.7Delaware County: 25.3 %Delaware County25.3Putnam County: 25.3 %Putnam County25.3Union County: 25 %Union County25Shelby County: 24.5 %Shelby County24.5Coshocton County: 24.3 %Coshocton County24.3Fairfield County: 24.1 %Fairfield County24.1Adams County: 24.1 %Adams County24.1Highland County: 24 %Highland County24Pike County: 24 %Pike County24Warren County: 23.9 %Warren County23.9Paulding County: 23.8 %Paulding County23.8Jackson County: 23.8 %Jackson County23.8Wayne County: 23.7 %Wayne County23.7Van Wert County: 23.7 %Van Wert County23.7Perry County: 23.7 %Perry County23.7Darke County: 23.6 %Darke County23.6Gallia County: 23.5 %Gallia County23.5Auglaize County: 23.5 %Auglaize County23.5Huron County: 23.3 %Huron County23.3Fayette County: 23.3 %Fayette County23.3Allen County: 23.2 %Allen County23.2Hardin County: 23.2 %Hardin County23.2Butler County: 23.2 %Butler County23.2Henry County: 23 %Henry County23Fulton County: 23 %Fulton County23Miami County: 22.9 %Miami County22.9Franklin County: 22.9 %Franklin County22.9Defiance County: 22.8 %Defiance County22.8Knox County: 22.8 %Knox County22.8Licking County: 22.7 %Licking County22.7Tuscarawas County: 22.7 %Tuscarawas County22.7Brown County: 22.7 %Brown County22.7Muskingum County: 22.6 %Muskingum County22.6Lucas County: 22.4 %Lucas County22.4Pickaway County: 22.4 %Pickaway County22.4Champaign County: 22.4 %Champaign County22.4Ashland County: 22.4 %Ashland County22.4Morrow County: 22.3 %Morrow County22.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Holmes County30.3-0.2 pts
2Mercer County25.7+0.1 pts
3Delaware County25.3-0.6 pts
4Putnam County25.3-0.1 pts
5Union County25-0 pts
6Shelby County24.5-0.1 pts
7Coshocton County24.3-0.1 pts
8Fairfield County24.1-0 pts
9Adams County24.1-0.1 pts
10Highland County24+0.1 pts
11Pike County24-0.3 pts
12Warren County23.9-0.3 pts
13Paulding County23.8-0.3 pts
14Jackson County23.8+0.1 pts
15Wayne County23.7-0.2 pts
16Van Wert County23.7+0.2 pts
17Perry County23.7-0.1 pts
18Darke County23.6-0.1 pts
19Gallia County23.5-0 pts
20Auglaize County23.5-0.2 pts
21Huron County23.30 pts
22Fayette County23.3-0.2 pts
23Allen County23.2-0.1 pts
24Hardin County23.2-0.1 pts
25Butler County23.2-0.3 pts
26Henry County23-0 pts
27Fulton County23-0.3 pts
28Miami County22.9-0.1 pts
29Franklin County22.9-0.1 pts
30Defiance County22.8-0.2 pts
31Knox County22.8-0.4 pts
32Licking County22.7-0.2 pts
33Tuscarawas County22.7+0.1 pts
34Brown County22.7-0 pts
35Muskingum County22.6-0.1 pts
36Lucas County22.4-0.1 pts
37Pickaway County22.4-0.1 pts
38Champaign County22.4-0 pts
39Ashland County22.4-0.1 pts
40Morrow County22.3-0.2 pts
41Clark County22.3-0.1 pts
42Clermont County22.3-0.2 pts
43Hamilton County22.3-0.2 pts
44Preble County22.3-0.2 pts
45Logan County22.2-0.1 pts
46Wyandot County22.1-0 pts
47Geauga County22.1-0.2 pts
48Clinton County22-0.2 pts
49Lawrence County21.9-0.1 pts
50Vinton County21.8+0.2 pts
51Williams County21.8-0.1 pts
52Sandusky County21.8-0 pts
53Hancock County21.8-0.1 pts
54Scioto County21.7-0.1 pts
55Guernsey County21.7+0.1 pts
56Montgomery County21.7-0.1 pts
57Ashtabula County21.7-0 pts
58Seneca County21.6-0.2 pts
59Hocking County21.6-0.1 pts
60Richland County21.5-0.1 pts
61Lorain County21.4-0.2 pts
62Harrison County21.4-0.1 pts
63Medina County21.4-0.2 pts
64Marion County21.4+0.3 pts
65Stark County21.3-0 pts
66Crawford County21.2-0.2 pts
67Ross County21.1-0.1 pts
68Meigs County21.1-0.3 pts
69Madison County21+0.3 pts
70Morgan County20.9+0.2 pts
71Greene County20.8-0.2 pts
72Carroll County20.7-0.2 pts
73Summit County20.5-0.2 pts
74Wood County20.5-0.3 pts
75Trumbull County20.10 pts
76Cuyahoga County20.1-0.1 pts
77Monroe County20.1-0.2 pts
78Columbiana County20.1-0.1 pts
79Mahoning County19.80 pts
80Washington County19.6-0.2 pts
81Jefferson County19.50 pts
82Erie County19.4-0.3 pts
83Belmont County19.1-0 pts
84Noble County19.1+0.3 pts
85Lake County19-0.2 pts
86Portage County18.2-0.4 pts
87Ottawa County17.7-0.4 pts
88Athens County15.4-0.8 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, 2022) [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, 2022. 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=2022. 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, 2022. 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=2022.

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, 2022 [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=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_ohio_by_2022,
  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, 2022}},
  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=2022. 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, 2022
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=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/ohio-counties?period=2022.
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 30.3% in 2022, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Athens County, with 15.4% in 2022.

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