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 2016, at 33.8%. Monroe County had the lowest, at 16.6%. The median was 23.1% and the figure for Indiana was 23.9%. Source: the U.S. Census Bureau.

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Highest33.8LaGrange County
Lowest16.6Monroe County
Median23.192 counties
Indiana23.9History

Map of counties, 2016

Adams County: 31.4 %Allen County: 26 %Bartholomew County: 24.1 %Benton County: 25.4 %Blackford County: 21.6 %Boone County: 27.1 %Brown County: 19.5 %Carroll County: 23.8 %Cass County: 24.6 %Clark County: 23.2 %Clay County: 22.8 %Clinton County: 26.1 %Crawford County: 21.6 %Daviess County: 29 %Dearborn County: 23 %Decatur County: 24.5 %DeKalb County: 24.7 %Delaware County: 19.5 %Dubois County: 23.9 %Elkhart County: 27.9 %Fayette County: 22.2 %Floyd County: 22.9 %Fountain County: 22.2 %Franklin County: 24.1 %Fulton County: 24.1 %Gibson County: 23.6 %Grant County: 20.7 %Greene County: 22.2 %Hamilton County: 28.5 %Hancock County: 24.1 %Harrison County: 23.1 %Hendricks County: 26.3 %Henry County: 20.7 %Howard County: 22.5 %Huntington County: 22.1 %Jackson County: 24.6 %Jasper County: 24.6 %Jay County: 26.1 %Jefferson County: 21.6 %Jennings County: 23.9 %Johnson County: 25.5 %Knox County: 21.9 %Kosciusko County: 24.5 %LaGrange County: 33.8 %Lake County: 24.3 %LaPorte County: 21.8 %Lawrence County: 21.9 %Madison County: 22.2 %Marion County: 24.5 %Marshall County: 25.4 %Martin County: 23.2 %Miami County: 22 %Monroe County: 16.6 %Montgomery County: 23.2 %Morgan County: 23.1 %Newton County: 22.1 %Noble County: 25.7 %Ohio County: 20.1 %Orange County: 23.3 %Owen County: 22.1 %Parke County: 22.9 %Perry County: 20.9 %Pike County: 22.3 %Porter County: 22.8 %Posey County: 22.8 %Pulaski County: 22.3 %Putnam County: 19.9 %Randolph County: 23.4 %Ripley County: 23.7 %Rush County: 23 %St. Joseph County: 23.6 %Scott County: 22.7 %Shelby County: 23.1 %Spencer County: 22.6 %Starke County: 22.8 %Steuben County: 20.6 %Sullivan County: 20.7 %Switzerland County: 25.4 %Tippecanoe County: 21.1 %Tipton County: 21.8 %Union County: 22.3 %Vanderburgh County: 21.9 %Vermillion County: 22 %Vigo County: 20.8 %Wabash County: 21.9 %Warren County: 22.4 %Warrick County: 24.8 %Washington County: 23.2 %Wayne County: 22.3 %Wells County: 24.1 %White County: 23.3 %Whitley County: 23.2 %
  • Under 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 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

LaGrange County: 33.8 %LaGrange County33.8Adams County: 31.4 %Adams County31.4Daviess County: 29 %Daviess County29Hamilton County: 28.5 %Hamilton County28.5Elkhart County: 27.9 %Elkhart County27.9Boone County: 27.1 %Boone County27.1Hendricks County: 26.3 %Hendricks County26.3Jay County: 26.1 %Jay County26.1Clinton County: 26.1 %Clinton County26.1Allen County: 26 %Allen County26Noble County: 25.7 %Noble County25.7Johnson County: 25.5 %Johnson County25.5Marshall County: 25.4 %Marshall County25.4Benton County: 25.4 %Benton County25.4Switzerland County: 25.4 %Switzerland County25.4Warrick County: 24.8 %Warrick County24.8DeKalb County: 24.7 %DeKalb County24.7Jackson County: 24.6 %Jackson County24.6Jasper County: 24.6 %Jasper County24.6Cass County: 24.6 %Cass County24.6Decatur County: 24.5 %Decatur County24.5Marion County: 24.5 %Marion County24.5Kosciusko County: 24.5 %Kosciusko County24.5Lake County: 24.3 %Lake County24.3Fulton County: 24.1 %Fulton County24.1Hancock County: 24.1 %Hancock County24.1Bartholomew County: 24.1 %Bartholomew County24.1Wells County: 24.1 %Wells County24.1Franklin County: 24.1 %Franklin County24.1Dubois County: 23.9 %Dubois County23.9Jennings County: 23.9 %Jennings County23.9Carroll County: 23.8 %Carroll County23.8Ripley County: 23.7 %Ripley County23.7St. Joseph County: 23.6 %St. Joseph County23.6Gibson County: 23.6 %Gibson County23.6Randolph County: 23.4 %Randolph County23.4Orange County: 23.3 %Orange County23.3White County: 23.3 %White County23.3Washington County: 23.2 %Washington County23.2Clark County: 23.2 %Clark County23.2LaGrange County: 33.8 %LaGrange County33.8Adams County: 31.4 %Adams County31.4Daviess County: 29 %Daviess County29Hamilton County: 28.5 %Hamilton County28.5Elkhart County: 27.9 %Elkhart County27.9Boone County: 27.1 %Boone County27.1Hendricks County: 26.3 %Hendricks County26.3Jay County: 26.1 %Jay County26.1Clinton County: 26.1 %Clinton County26.1Allen County: 26 %Allen County26Noble County: 25.7 %Noble County25.7Johnson County: 25.5 %Johnson County25.5Marshall County: 25.4 %Marshall County25.4Benton County: 25.4 %Benton County25.4Switzerland County: 25.4 %Switzerland County25.4Warrick County: 24.8 %Warrick County24.8DeKalb County: 24.7 %DeKalb County24.7Jackson County: 24.6 %Jackson County24.6Jasper County: 24.6 %Jasper County24.6Cass County: 24.6 %Cass County24.6Decatur County: 24.5 %Decatur County24.5Marion County: 24.5 %Marion County24.5Kosciusko County: 24.5 %Kosciusko County24.5Lake County: 24.3 %Lake County24.3Fulton County: 24.1 %Fulton County24.1Hancock County: 24.1 %Hancock County24.1Bartholomew County: 24.1 %Bartholomew County24.1Wells County: 24.1 %Wells County24.1Franklin County: 24.1 %Franklin County24.1Dubois County: 23.9 %Dubois County23.9Jennings County: 23.9 %Jennings County23.9Carroll County: 23.8 %Carroll County23.8Ripley County: 23.7 %Ripley County23.7St. Joseph County: 23.6 %St. Joseph County23.6Gibson County: 23.6 %Gibson County23.6Randolph County: 23.4 %Randolph County23.4Orange County: 23.3 %Orange County23.3White County: 23.3 %White County23.3Washington County: 23.2 %Washington County23.2Clark County: 23.2 %Clark County23.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2016 (%)Change on 2015
1LaGrange County33.8-0.1 pts
2Adams County31.4+0.1 pts
3Daviess County29+0.2 pts
4Hamilton County28.5-0.4 pts
5Elkhart County27.9-0.1 pts
6Boone County27.1-0.2 pts
7Hendricks County26.3-0.1 pts
8Jay County26.1-0.1 pts
9Clinton County26.1-0.1 pts
10Allen County26-0.1 pts
11Noble County25.7-0.4 pts
12Johnson County25.5-0 pts
13Marshall County25.4-0.1 pts
14Benton County25.4+0.1 pts
15Switzerland County25.4-0.3 pts
16Warrick County24.8-0.1 pts
17DeKalb County24.7-0.1 pts
18Jackson County24.6-0 pts
19Jasper County24.6-0.4 pts
20Cass County24.6-0.1 pts
21Decatur County24.5-0 pts
22Marion County24.5-0.1 pts
23Kosciusko County24.5-0.1 pts
24Lake County24.3-0.2 pts
25Fulton County24.1-0 pts
26Hancock County24.1-0 pts
27Bartholomew County24.10 pts
28Wells County24.1-0.1 pts
29Franklin County24.1-0.3 pts
30Dubois County23.9-0 pts
31Jennings County23.9-0.3 pts
32Carroll County23.8+0.2 pts
33Ripley County23.7-0.3 pts
34St. Joseph County23.6-0.1 pts
35Gibson County23.60 pts
36Randolph County23.4-0.1 pts
37Orange County23.3-0.1 pts
38White County23.3-0 pts
39Washington County23.2-0.2 pts
40Clark County23.2-0.1 pts
41Martin County23.2-0.2 pts
42Montgomery County23.2-0.1 pts
43Whitley County23.2-0.1 pts
44Harrison County23.1+0.1 pts
45Morgan County23.1-0.3 pts
46Shelby County23.1-0 pts
47Dearborn County23-0.3 pts
48Rush County23-0.2 pts
49Floyd County22.9-0.3 pts
50Parke County22.9+0.5 pts
51Posey County22.8-0.2 pts
52Starke County22.8+0.1 pts
53Porter County22.8-0.2 pts
54Clay County22.8-0.2 pts
55Scott County22.7-0.1 pts
56Spencer County22.6-0.2 pts
57Howard County22.5-0 pts
58Warren County22.4+0.1 pts
59Pike County22.3+0.3 pts
60Pulaski County22.3-0.6 pts
61Wayne County22.3-0.2 pts
62Union County22.3-0.6 pts
63Madison County22.2-0 pts
64Fountain County22.2-0.6 pts
65Fayette County22.2-0.4 pts
66Greene County22.2-0.3 pts
67Newton County22.1+0.1 pts
68Huntington County22.1-0.1 pts
69Owen County22.1-0.2 pts
70Vermillion County22-0.1 pts
71Miami County22-0.1 pts
72Wabash County21.9-0.1 pts
73Lawrence County21.9-0.1 pts
74Vanderburgh County21.9-0.1 pts
75Knox County21.9+0.3 pts
76LaPorte County21.8-0.1 pts
77Tipton County21.8-0.3 pts
78Crawford County21.6-0.2 pts
79Jefferson County21.6+0.2 pts
80Blackford County21.6-0.3 pts
81Tippecanoe County21.10 pts
82Perry County20.9+0.3 pts
83Vigo County20.8-0.1 pts
84Sullivan County20.7-0.1 pts
85Grant County20.7-0 pts
86Henry County20.7-0.2 pts
87Steuben County20.6-0.1 pts
88Ohio County20.10 pts
89Putnam County19.9+0.2 pts
90Delaware County19.5-0.2 pts
91Brown County19.5-0 pts
92Monroe County16.6+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, 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 Indiana 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/indiana-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 Indiana 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/indiana-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 Indiana 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/indiana-counties?period=2016 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_indiana_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 Indiana 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/indiana-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 Indiana 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/indiana-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/indiana-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 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 33.8% in 2016, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Monroe County, with 16.6% 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 Indiana: more rankings