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 2017, at 33.6%. Monroe County had the lowest, at 16.6%. The median was 23% and the figure for Indiana was 23.8%. Source: the U.S. Census Bureau.

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Highest33.6LaGrange County
Lowest16.6Monroe County
Median2392 counties
Indiana23.8History

Map of counties, 2017

Adams County: 31.4 %Allen County: 25.9 %Bartholomew County: 24.1 %Benton County: 25.3 %Blackford County: 21.3 %Boone County: 27 %Brown County: 19.1 %Carroll County: 23.5 %Cass County: 24.5 %Clark County: 23.1 %Clay County: 22.8 %Clinton County: 26.2 %Crawford County: 21.5 %Daviess County: 29.1 %Dearborn County: 22.8 %Decatur County: 24.2 %DeKalb County: 24.4 %Delaware County: 19.4 %Dubois County: 23.9 %Elkhart County: 27.8 %Fayette County: 21.9 %Floyd County: 22.7 %Fountain County: 22.2 %Franklin County: 23.7 %Fulton County: 23.9 %Gibson County: 23.6 %Grant County: 20.7 %Greene County: 22.4 %Hamilton County: 28.1 %Hancock County: 24 %Harrison County: 23 %Hendricks County: 26.1 %Henry County: 20.6 %Howard County: 22.3 %Huntington County: 21.9 %Jackson County: 24.8 %Jasper County: 24.3 %Jay County: 26 %Jefferson County: 21.2 %Jennings County: 23.6 %Johnson County: 25.3 %Knox County: 22.1 %Kosciusko County: 24.2 %LaGrange County: 33.6 %Lake County: 24.1 %LaPorte County: 21.7 %Lawrence County: 21.8 %Madison County: 22.2 %Marion County: 24.4 %Marshall County: 25.2 %Martin County: 23.1 %Miami County: 22 %Monroe County: 16.6 %Montgomery County: 23.2 %Morgan County: 22.9 %Newton County: 22 %Noble County: 25.5 %Ohio County: 20.2 %Orange County: 23.3 %Owen County: 21.6 %Parke County: 23.1 %Perry County: 21 %Pike County: 22 %Porter County: 22.6 %Posey County: 22.8 %Pulaski County: 22.4 %Putnam County: 20.1 %Randolph County: 23.2 %Ripley County: 23.7 %Rush County: 23.2 %St. Joseph County: 23.5 %Scott County: 22.9 %Shelby County: 23 %Spencer County: 22.4 %Starke County: 22.6 %Steuben County: 20.5 %Sullivan County: 20.5 %Switzerland County: 25.6 %Tippecanoe County: 21.3 %Tipton County: 21.4 %Union County: 22.5 %Vanderburgh County: 21.8 %Vermillion County: 21.9 %Vigo County: 20.7 %Wabash County: 21.7 %Warren County: 22.5 %Warrick County: 24.9 %Washington County: 23.2 %Wayne County: 22.3 %Wells County: 24.3 %White County: 23.4 %Whitley County: 23.1 %
  • Under 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2017. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

LaGrange County: 33.6 %LaGrange County33.6Adams County: 31.4 %Adams County31.4Daviess County: 29.1 %Daviess County29.1Hamilton County: 28.1 %Hamilton County28.1Elkhart County: 27.8 %Elkhart County27.8Boone County: 27 %Boone County27Clinton County: 26.2 %Clinton County26.2Hendricks County: 26.1 %Hendricks County26.1Jay County: 26 %Jay County26Allen County: 25.9 %Allen County25.9Switzerland County: 25.6 %Switzerland County25.6Noble County: 25.5 %Noble County25.5Johnson County: 25.3 %Johnson County25.3Benton County: 25.3 %Benton County25.3Marshall County: 25.2 %Marshall County25.2Warrick County: 24.9 %Warrick County24.9Jackson County: 24.8 %Jackson County24.8Cass County: 24.5 %Cass County24.5Marion County: 24.4 %Marion County24.4DeKalb County: 24.4 %DeKalb County24.4Jasper County: 24.3 %Jasper County24.3Wells County: 24.3 %Wells County24.3Kosciusko County: 24.2 %Kosciusko County24.2Decatur County: 24.2 %Decatur County24.2Lake County: 24.1 %Lake County24.1Bartholomew County: 24.1 %Bartholomew County24.1Hancock County: 24 %Hancock County24Fulton County: 23.9 %Fulton County23.9Dubois County: 23.9 %Dubois County23.9Ripley County: 23.7 %Ripley County23.7Franklin County: 23.7 %Franklin County23.7Jennings County: 23.6 %Jennings County23.6Gibson County: 23.6 %Gibson County23.6Carroll County: 23.5 %Carroll County23.5St. Joseph County: 23.5 %St. Joseph County23.5White County: 23.4 %White County23.4Orange County: 23.3 %Orange County23.3Washington County: 23.2 %Washington County23.2Montgomery County: 23.2 %Montgomery County23.2Randolph County: 23.2 %Randolph County23.2LaGrange County: 33.6 %LaGrange County33.6Adams County: 31.4 %Adams County31.4Daviess County: 29.1 %Daviess County29.1Hamilton County: 28.1 %Hamilton County28.1Elkhart County: 27.8 %Elkhart County27.8Boone County: 27 %Boone County27Clinton County: 26.2 %Clinton County26.2Hendricks County: 26.1 %Hendricks County26.1Jay County: 26 %Jay County26Allen County: 25.9 %Allen County25.9Switzerland County: 25.6 %Switzerland County25.6Noble County: 25.5 %Noble County25.5Johnson County: 25.3 %Johnson County25.3Benton County: 25.3 %Benton County25.3Marshall County: 25.2 %Marshall County25.2Warrick County: 24.9 %Warrick County24.9Jackson County: 24.8 %Jackson County24.8Cass County: 24.5 %Cass County24.5Marion County: 24.4 %Marion County24.4DeKalb County: 24.4 %DeKalb County24.4Jasper County: 24.3 %Jasper County24.3Wells County: 24.3 %Wells County24.3Kosciusko County: 24.2 %Kosciusko County24.2Decatur County: 24.2 %Decatur County24.2Lake County: 24.1 %Lake County24.1Bartholomew County: 24.1 %Bartholomew County24.1Hancock County: 24 %Hancock County24Fulton County: 23.9 %Fulton County23.9Dubois County: 23.9 %Dubois County23.9Ripley County: 23.7 %Ripley County23.7Franklin County: 23.7 %Franklin County23.7Jennings County: 23.6 %Jennings County23.6Gibson County: 23.6 %Gibson County23.6Carroll County: 23.5 %Carroll County23.5St. Joseph County: 23.5 %St. Joseph County23.5White County: 23.4 %White County23.4Orange County: 23.3 %Orange County23.3Washington County: 23.2 %Washington County23.2Montgomery County: 23.2 %Montgomery County23.2Randolph County: 23.2 %Randolph County23.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1LaGrange County33.6-0.1 pts
2Adams County31.40 pts
3Daviess County29.1+0.1 pts
4Hamilton County28.1-0.4 pts
5Elkhart County27.8-0.1 pts
6Boone County27-0.1 pts
7Clinton County26.2+0.1 pts
8Hendricks County26.1-0.2 pts
9Jay County26-0.1 pts
10Allen County25.9-0.1 pts
11Switzerland County25.6+0.2 pts
12Noble County25.5-0.3 pts
13Johnson County25.3-0.2 pts
14Benton County25.3-0.1 pts
15Marshall County25.2-0.2 pts
16Warrick County24.90 pts
17Jackson County24.8+0.2 pts
18Cass County24.5-0.1 pts
19Marion County24.4-0.1 pts
20DeKalb County24.4-0.3 pts
21Jasper County24.3-0.2 pts
22Wells County24.3+0.2 pts
23Kosciusko County24.2-0.3 pts
24Decatur County24.2-0.4 pts
25Lake County24.1-0.2 pts
26Bartholomew County24.1-0 pts
27Hancock County24-0.1 pts
28Fulton County23.9-0.2 pts
29Dubois County23.9-0.1 pts
30Ripley County23.70 pts
31Franklin County23.7-0.4 pts
32Jennings County23.6-0.3 pts
33Gibson County23.6-0 pts
34Carroll County23.5-0.2 pts
35St. Joseph County23.5-0.2 pts
36White County23.4+0.1 pts
37Orange County23.30 pts
38Washington County23.20 pts
39Montgomery County23.20 pts
40Randolph County23.2-0.2 pts
41Rush County23.2+0.2 pts
42Clark County23.1-0.1 pts
42Parke County23.1+0.2 pts
44Martin County23.1-0.1 pts
45Whitley County23.1-0.1 pts
46Shelby County23-0.1 pts
47Harrison County23-0.1 pts
48Scott County22.9+0.2 pts
49Morgan County22.9-0.3 pts
50Dearborn County22.8-0.2 pts
51Posey County22.8-0 pts
52Clay County22.80 pts
53Floyd County22.7-0.3 pts
54Porter County22.6-0.2 pts
55Starke County22.6-0.3 pts
56Warren County22.5+0.1 pts
57Union County22.5+0.2 pts
58Greene County22.4+0.2 pts
58Pulaski County22.4+0.1 pts
60Spencer County22.4-0.2 pts
61Howard County22.3-0.1 pts
62Wayne County22.3-0.1 pts
63Fountain County22.20 pts
64Madison County22.2-0 pts
65Knox County22.1+0.2 pts
66Newton County22-0.1 pts
67Pike County22-0.3 pts
68Miami County220 pts
69Fayette County21.9-0.2 pts
70Huntington County21.9-0.2 pts
71Vermillion County21.9-0.2 pts
72Lawrence County21.8-0.1 pts
73Vanderburgh County21.8-0.1 pts
74Wabash County21.7-0.2 pts
75LaPorte County21.7-0.1 pts
76Owen County21.6-0.4 pts
77Crawford County21.5-0.1 pts
78Tipton County21.4-0.3 pts
79Blackford County21.3-0.2 pts
80Tippecanoe County21.3+0.1 pts
81Jefferson County21.2-0.4 pts
82Perry County21+0.1 pts
83Vigo County20.7-0 pts
84Grant County20.7-0 pts
85Henry County20.6-0.1 pts
86Sullivan County20.5-0.2 pts
87Steuben County20.5-0.1 pts
88Ohio County20.20 pts
89Putnam County20.1+0.2 pts
90Delaware County19.4-0.1 pts
91Brown County19.1-0.4 pts
92Monroe County16.6-0 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, 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 Indiana 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/indiana-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 Indiana 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/indiana-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 Indiana 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/indiana-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_indiana_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 Indiana 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/indiana-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 Indiana 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/indiana-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/indiana-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 Indiana by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

LaGrange County, with 33.6% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Monroe County, with 16.6% 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 Indiana: more rankings