Data / Rankings / Population under 18 / Counties in Indiana

Counties in Indiana by population under 18

LaGrange County had the highest population under 18 of 92 counties in 2023, at 32.3%. Monroe County had the lowest, at 15.6%. The median was 22.4% and the figure for Indiana was 23.1%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest32.3LaGrange County
Lowest15.6Monroe County
Median22.492 counties
Indiana23.1History

Map of counties, 2023

Adams County: 31.5 %Allen County: 25.1 %Bartholomew County: 23.5 %Benton County: 24.2 %Blackford County: 21.4 %Boone County: 25.4 %Brown County: 16.9 %Carroll County: 22.6 %Cass County: 24.3 %Clark County: 22.1 %Clay County: 22.4 %Clinton County: 25.7 %Crawford County: 20.3 %Daviess County: 29.6 %Dearborn County: 21.8 %Decatur County: 22.9 %DeKalb County: 24 %Delaware County: 19.1 %Dubois County: 23.3 %Elkhart County: 26.6 %Fayette County: 21.8 %Floyd County: 22.1 %Fountain County: 22.2 %Franklin County: 22.8 %Fulton County: 23.1 %Gibson County: 23.4 %Grant County: 21 %Greene County: 21.9 %Hamilton County: 25.2 %Hancock County: 23.4 %Harrison County: 22.4 %Hendricks County: 24.7 %Henry County: 19.9 %Howard County: 22.2 %Huntington County: 21.6 %Jackson County: 24.7 %Jasper County: 23 %Jay County: 25.5 %Jefferson County: 20.6 %Jennings County: 23.4 %Johnson County: 24.4 %Knox County: 21.8 %Kosciusko County: 23.1 %LaGrange County: 32.3 %Lake County: 22.9 %LaPorte County: 20.9 %Lawrence County: 21 %Madison County: 21.4 %Marion County: 24.2 %Marshall County: 24.1 %Martin County: 22.6 %Miami County: 21.6 %Monroe County: 15.6 %Montgomery County: 22.9 %Morgan County: 21.7 %Newton County: 21.1 %Noble County: 24.5 %Ohio County: 19.6 %Orange County: 23.1 %Owen County: 20.4 %Parke County: 24.5 %Perry County: 20.1 %Pike County: 22.1 %Porter County: 21.1 %Posey County: 21.9 %Pulaski County: 21.8 %Putnam County: 19.7 %Randolph County: 22.4 %Ripley County: 23.4 %Rush County: 22.3 %St. Joseph County: 23 %Scott County: 22.3 %Shelby County: 22.1 %Spencer County: 21.7 %Starke County: 21.7 %Steuben County: 19.7 %Sullivan County: 20.2 %Switzerland County: 24.5 %Tippecanoe County: 20.5 %Tipton County: 20.8 %Union County: 21.7 %Vanderburgh County: 21.5 %Vermillion County: 21 %Vigo County: 20.4 %Wabash County: 21.2 %Warren County: 21.9 %Warrick County: 23.3 %Washington County: 22.5 %Wayne County: 22.5 %Wells County: 24.2 %White County: 23 %Whitley County: 22.6 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2023

LaGrange County: 32.3 %LaGrange County32.3Adams County: 31.5 %Adams County31.5Daviess County: 29.6 %Daviess County29.6Elkhart County: 26.6 %Elkhart County26.6Clinton County: 25.7 %Clinton County25.7Jay County: 25.5 %Jay County25.5Boone County: 25.4 %Boone County25.4Hamilton County: 25.2 %Hamilton County25.2Allen County: 25.1 %Allen County25.1Jackson County: 24.7 %Jackson County24.7Hendricks County: 24.7 %Hendricks County24.7Noble County: 24.5 %Noble County24.5Switzerland County: 24.5 %Switzerland County24.5Parke County: 24.5 %Parke County24.5Johnson County: 24.4 %Johnson County24.4Cass County: 24.3 %Cass County24.3Wells County: 24.2 %Wells County24.2Marion County: 24.2 %Marion County24.2Benton County: 24.2 %Benton County24.2Marshall County: 24.1 %Marshall County24.1DeKalb County: 24 %DeKalb County24Bartholomew County: 23.5 %Bartholomew County23.5Ripley County: 23.4 %Ripley County23.4Hancock County: 23.4 %Hancock County23.4Jennings County: 23.4 %Jennings County23.4Gibson County: 23.4 %Gibson County23.4Dubois County: 23.3 %Dubois County23.3Warrick County: 23.3 %Warrick County23.3Fulton County: 23.1 %Fulton County23.1Kosciusko County: 23.1 %Kosciusko County23.1Orange County: 23.1 %Orange County23.1Jasper County: 23 %Jasper County23White County: 23 %White County23St. Joseph County: 23 %St. Joseph County23Lake County: 22.9 %Lake County22.9Decatur County: 22.9 %Decatur County22.9Montgomery County: 22.9 %Montgomery County22.9Franklin County: 22.8 %Franklin County22.8Whitley County: 22.6 %Whitley County22.6Martin County: 22.6 %Martin County22.6LaGrange County: 32.3 %LaGrange County32.3Adams County: 31.5 %Adams County31.5Daviess County: 29.6 %Daviess County29.6Elkhart County: 26.6 %Elkhart County26.6Clinton County: 25.7 %Clinton County25.7Jay County: 25.5 %Jay County25.5Boone County: 25.4 %Boone County25.4Hamilton County: 25.2 %Hamilton County25.2Allen County: 25.1 %Allen County25.1Jackson County: 24.7 %Jackson County24.7Hendricks County: 24.7 %Hendricks County24.7Noble County: 24.5 %Noble County24.5Switzerland County: 24.5 %Switzerland County24.5Parke County: 24.5 %Parke County24.5Johnson County: 24.4 %Johnson County24.4Cass County: 24.3 %Cass County24.3Wells County: 24.2 %Wells County24.2Marion County: 24.2 %Marion County24.2Benton County: 24.2 %Benton County24.2Marshall County: 24.1 %Marshall County24.1DeKalb County: 24 %DeKalb County24Bartholomew County: 23.5 %Bartholomew County23.5Ripley County: 23.4 %Ripley County23.4Hancock County: 23.4 %Hancock County23.4Jennings County: 23.4 %Jennings County23.4Gibson County: 23.4 %Gibson County23.4Dubois County: 23.3 %Dubois County23.3Warrick County: 23.3 %Warrick County23.3Fulton County: 23.1 %Fulton County23.1Kosciusko County: 23.1 %Kosciusko County23.1Orange County: 23.1 %Orange County23.1Jasper County: 23 %Jasper County23White County: 23 %White County23St. Joseph County: 23 %St. Joseph County23Lake County: 22.9 %Lake County22.9Decatur County: 22.9 %Decatur County22.9Montgomery County: 22.9 %Montgomery County22.9Franklin County: 22.8 %Franklin County22.8Whitley County: 22.6 %Whitley County22.6Martin County: 22.6 %Martin County22.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1LaGrange County32.3-0.2 pts
2Adams County31.50 pts
3Daviess County29.60 pts
4Elkhart County26.6-0.3 pts
5Clinton County25.7+0.1 pts
6Jay County25.5+0.1 pts
7Boone County25.4-0.3 pts
8Hamilton County25.2-0.5 pts
9Allen County25.1-0.2 pts
10Jackson County24.7+0.1 pts
11Hendricks County24.7-0.1 pts
12Noble County24.5-0.2 pts
13Switzerland County24.5+0.2 pts
14Parke County24.5+0.6 pts
15Johnson County24.4-0.2 pts
16Cass County24.3-0.1 pts
17Wells County24.2-0.1 pts
18Marion County24.2-0 pts
19Benton County24.2+0.2 pts
20Marshall County24.1-0.3 pts
21DeKalb County24-0.3 pts
22Bartholomew County23.5-0.4 pts
23Ripley County23.4+0.1 pts
24Hancock County23.4-0.1 pts
25Jennings County23.4-0.1 pts
26Gibson County23.4-0.3 pts
27Dubois County23.30 pts
28Warrick County23.3-0.2 pts
29Fulton County23.1-0.3 pts
30Kosciusko County23.1-0.2 pts
31Orange County23.1+0.1 pts
32Jasper County23-0.3 pts
33White County23-0 pts
34St. Joseph County23-0.1 pts
35Lake County22.9-0.3 pts
36Decatur County22.9-0.2 pts
37Montgomery County22.9-0.1 pts
38Franklin County22.8-0.3 pts
39Whitley County22.6-0.1 pts
40Martin County22.6-0.3 pts
41Carroll County22.6-0.3 pts
42Wayne County22.5-0.1 pts
43Washington County22.5-0.3 pts
44Clay County22.4-0.2 pts
45Harrison County22.4-0.1 pts
46Randolph County22.4-0.3 pts
47Rush County22.3-0.2 pts
48Scott County22.3-0.1 pts
49Howard County22.2-0 pts
50Fountain County22.2+0.2 pts
51Pike County22.1-0.2 pts
52Floyd County22.1-0.3 pts
53Clark County22.1-0.2 pts
54Shelby County22.1-0.2 pts
55Greene County21.9-0.2 pts
56Posey County21.9-0.3 pts
57Warren County21.9-0.1 pts
58Dearborn County21.8-0.1 pts
59Fayette County21.80 pts
60Knox County21.80 pts
61Pulaski County21.8-0.2 pts
62Spencer County21.7-0.2 pts
63Morgan County21.7-0.2 pts
64Union County21.7-0.4 pts
65Starke County21.7-0 pts
66Miami County21.6-0.2 pts
67Huntington County21.6-0.3 pts
68Vanderburgh County21.5-0.1 pts
69Madison County21.4-0.1 pts
70Blackford County21.40 pts
71Wabash County21.2-0.2 pts
72Porter County21.1-0.4 pts
73Newton County21.10 pts
74Grant County21-0.1 pts
75Lawrence County21-0.3 pts
76Vermillion County21-0.3 pts
77LaPorte County20.9-0.1 pts
78Tipton County20.8-0.5 pts
79Jefferson County20.6-0.2 pts
80Tippecanoe County20.5-0.3 pts
81Owen County20.40 pts
81Vigo County20.4-0 pts
83Crawford County20.3-0.7 pts
84Sullivan County20.2+0.3 pts
85Perry County20.1-0.5 pts
86Henry County19.9-0.2 pts
87Putnam County19.7+0.1 pts
88Steuben County19.7-0.1 pts
89Ohio County19.6-0.7 pts
90Delaware County19.1-0.1 pts
91Brown County16.9-0.3 pts
92Monroe 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 Indiana by population under 18, 2023) [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 Indiana by population under 18, 2023. 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/indiana-counties?period=2023. 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 Indiana by population under 18, 2023. 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/indiana-counties?period=2023.

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 Indiana by population under 18, 2023 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/indiana-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_indiana_by_2023,
  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 Indiana by population under 18, 2023}},
  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/indiana-counties?period=2023. 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 Indiana by population under 18, 2023
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/indiana-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/indiana-counties?period=2023.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Indiana by population under 18 using official data, and cite the source.
rank_places {"indicator":"population_0_17_share","level":"province","within":"Indiana","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_0_17_share&level=province&within=Indiana&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest population under 18?

LaGrange County, with 32.3% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Monroe County, with 15.6% in 2023.

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 Indiana: more rankings