Data / Rankings / Population under 18 / Counties in Tennessee

Counties in Tennessee by population under 18

Montgomery County had the highest population under 18 of 95 counties in 2024, at 26.2%. Lake County had the lowest, at 16.3%. The median was 20.8% and the figure for Tennessee was 21.7%. Source: the U.S. Census Bureau.

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Highest26.2Montgomery County
Lowest16.3Lake County
Median20.895 counties
Tennessee21.7History

Map of counties, 2024

Anderson County: 20.8 %Bedford County: 24.8 %Benton County: 19.4 %Bledsoe County: 16.9 %Blount County: 19.8 %Bradley County: 21.6 %Campbell County: 20.4 %Cannon County: 21.2 %Carroll County: 21.1 %Carter County: 17.5 %Cheatham County: 20.8 %Chester County: 21.9 %Claiborne County: 18.7 %Clay County: 19.6 %Cocke County: 19.8 %Coffee County: 22.8 %Crockett County: 22.9 %Cumberland County: 16.6 %Davidson County: 19.9 %Decatur County: 19.6 %DeKalb County: 21.8 %Dickson County: 22 %Dyer County: 23.9 %Fayette County: 17.4 %Fentress County: 20.3 %Franklin County: 19.1 %Gibson County: 23.6 %Giles County: 20.3 %Grainger County: 19.2 %Greene County: 18.5 %Grundy County: 21.4 %Hamblen County: 23.3 %Hamilton County: 20.9 %Hancock County: 20.4 %Hardeman County: 18.6 %Hardin County: 19.7 %Hawkins County: 18.9 %Haywood County: 21.2 %Henderson County: 22.1 %Henry County: 19.7 %Hickman County: 21 %Houston County: 21.2 %Humphreys County: 21.1 %Jackson County: 18.6 %Jefferson County: 19.3 %Johnson County: 16.4 %Knox County: 20.6 %Lake County: 16.3 %Lauderdale County: 21.3 %Lawrence County: 24.6 %Lewis County: 22 %Lincoln County: 22 %Loudon County: 18.4 %McMinn County: 21.5 %McNairy County: 21 %Macon County: 24.4 %Madison County: 22 %Marion County: 19.7 %Marshall County: 23.3 %Maury County: 22.1 %Meigs County: 20.5 %Monroe County: 20.2 %Montgomery County: 26.2 %Moore County: 19.5 %Morgan County: 19.9 %Obion County: 21.5 %Overton County: 20.6 %Perry County: 21.8 %Pickett County: 17.7 %Polk County: 18.3 %Putnam County: 20.9 %Rhea County: 20.9 %Roane County: 19.1 %Robertson County: 23.4 %Rutherford County: 24.6 %Scott County: 23.4 %Sequatchie County: 19.6 %Sevier County: 20.5 %Shelby County: 24.5 %Smith County: 22.7 %Stewart County: 20.8 %Sullivan County: 18.8 %Sumner County: 22.6 %Tipton County: 23.2 %Trousdale County: 19.1 %Unicoi County: 17.2 %Union County: 21.3 %Van Buren County: 20.5 %Warren County: 22.8 %Washington County: 18 %Wayne County: 17.3 %Weakley County: 19.1 %White County: 21.3 %Williamson County: 25.2 %Wilson County: 23.3 %
  • Under 19
  • 19 to 20
  • 20 to 21
  • 21 to 23
  • 23 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Montgomery County: 26.2 %Montgomery County26.2Williamson County: 25.2 %Williamson County25.2Bedford County: 24.8 %Bedford County24.8Lawrence County: 24.6 %Lawrence County24.6Rutherford County: 24.6 %Rutherford County24.6Shelby County: 24.5 %Shelby County24.5Macon County: 24.4 %Macon County24.4Dyer County: 23.9 %Dyer County23.9Gibson County: 23.6 %Gibson County23.6Robertson County: 23.4 %Robertson County23.4Scott County: 23.4 %Scott County23.4Marshall County: 23.3 %Marshall County23.3Wilson County: 23.3 %Wilson County23.3Hamblen County: 23.3 %Hamblen County23.3Tipton County: 23.2 %Tipton County23.2Crockett County: 22.9 %Crockett County22.9Coffee County: 22.8 %Coffee County22.8Warren County: 22.8 %Warren County22.8Smith County: 22.7 %Smith County22.7Sumner County: 22.6 %Sumner County22.6Maury County: 22.1 %Maury County22.1Henderson County: 22.1 %Henderson County22.1Madison County: 22 %Madison County22Dickson County: 22 %Dickson County22Lewis County: 22 %Lewis County22Lincoln County: 22 %Lincoln County22Chester County: 21.9 %Chester County21.9DeKalb County: 21.8 %DeKalb County21.8Perry County: 21.8 %Perry County21.8Bradley County: 21.6 %Bradley County21.6McMinn County: 21.5 %McMinn County21.5Obion County: 21.5 %Obion County21.5Grundy County: 21.4 %Grundy County21.4White County: 21.3 %White County21.3Union County: 21.3 %Union County21.3Lauderdale County: 21.3 %Lauderdale County21.3Cannon County: 21.2 %Cannon County21.2Haywood County: 21.2 %Haywood County21.2Houston County: 21.2 %Houston County21.2Humphreys County: 21.1 %Humphreys County21.1Montgomery County: 26.2 %Montgomery County26.2Williamson County: 25.2 %Williamson County25.2Bedford County: 24.8 %Bedford County24.8Lawrence County: 24.6 %Lawrence County24.6Rutherford County: 24.6 %Rutherford County24.6Shelby County: 24.5 %Shelby County24.5Macon County: 24.4 %Macon County24.4Dyer County: 23.9 %Dyer County23.9Gibson County: 23.6 %Gibson County23.6Robertson County: 23.4 %Robertson County23.4Scott County: 23.4 %Scott County23.4Marshall County: 23.3 %Marshall County23.3Wilson County: 23.3 %Wilson County23.3Hamblen County: 23.3 %Hamblen County23.3Tipton County: 23.2 %Tipton County23.2Crockett County: 22.9 %Crockett County22.9Coffee County: 22.8 %Coffee County22.8Warren County: 22.8 %Warren County22.8Smith County: 22.7 %Smith County22.7Sumner County: 22.6 %Sumner County22.6Maury County: 22.1 %Maury County22.1Henderson County: 22.1 %Henderson County22.1Madison County: 22 %Madison County22Dickson County: 22 %Dickson County22Lewis County: 22 %Lewis County22Lincoln County: 22 %Lincoln County22Chester County: 21.9 %Chester County21.9DeKalb County: 21.8 %DeKalb County21.8Perry County: 21.8 %Perry County21.8Bradley County: 21.6 %Bradley County21.6McMinn County: 21.5 %McMinn County21.5Obion County: 21.5 %Obion County21.5Grundy County: 21.4 %Grundy County21.4White County: 21.3 %White County21.3Union County: 21.3 %Union County21.3Lauderdale County: 21.3 %Lauderdale County21.3Cannon County: 21.2 %Cannon County21.2Haywood County: 21.2 %Haywood County21.2Houston County: 21.2 %Houston County21.2Humphreys County: 21.1 %Humphreys County21.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Montgomery County26.2-0.4 pts
2Williamson County25.2-0.7 pts
3Bedford County24.8-0.1 pts
4Lawrence County24.6-0.3 pts
5Rutherford County24.6-0.2 pts
6Shelby County24.5-0 pts
7Macon County24.4-0.1 pts
8Dyer County23.9-0.2 pts
9Gibson County23.6-0.4 pts
10Robertson County23.4-0.2 pts
11Scott County23.4-0.1 pts
12Marshall County23.3-0.3 pts
13Wilson County23.3-0.1 pts
14Hamblen County23.3+0.2 pts
15Tipton County23.2-0.4 pts
16Crockett County22.9-0.1 pts
17Coffee County22.8-0.2 pts
18Warren County22.8-0.2 pts
19Smith County22.7+0.1 pts
20Sumner County22.6-0.3 pts
21Maury County22.1-0.2 pts
22Henderson County22.1-0.3 pts
23Madison County220 pts
24Dickson County22-0.3 pts
25Lewis County22-0.1 pts
26Lincoln County22-0.3 pts
27Chester County21.9-0.1 pts
28DeKalb County21.8-0.1 pts
29Perry County21.8-0.1 pts
30Bradley County21.6-0.1 pts
31McMinn County21.5-0.1 pts
32Obion County21.5-0.2 pts
33Grundy County21.4+0.2 pts
34White County21.3-0.2 pts
35Union County21.3-0.2 pts
36Lauderdale County21.3-0.4 pts
37Cannon County21.2-0.1 pts
38Haywood County21.2-0.5 pts
39Houston County21.2+0.4 pts
40Humphreys County21.1-0.1 pts
41Carroll County21.1+0.1 pts
42McNairy County210 pts
43Hickman County21-0.2 pts
44Hamilton County20.9-0 pts
45Rhea County20.9-0.2 pts
46Putnam County20.9+0.1 pts
47Anderson County20.80 pts
48Cheatham County20.8-0.1 pts
49Stewart County20.8-0.2 pts
50Knox County20.6-0.1 pts
51Overton County20.6-0.2 pts
52Sevier County20.5+0.1 pts
53Van Buren County20.5-0.5 pts
54Meigs County20.5+0.1 pts
55Hancock County20.4-0.2 pts
56Campbell County20.4-0.1 pts
57Fentress County20.3-0.1 pts
58Giles County20.3-0.3 pts
59Monroe County20.2-0.2 pts
60Davidson County19.9+0.2 pts
61Morgan County19.9-0.3 pts
62Blount County19.8-0.2 pts
63Cocke County19.8-0.3 pts
64Henry County19.7-0.1 pts
65Marion County19.7-0.2 pts
66Hardin County19.7-0.1 pts
67Decatur County19.6-0.3 pts
68Clay County19.6-0.2 pts
69Sequatchie County19.6-0.3 pts
70Moore County19.5-0.7 pts
71Benton County19.4-0.4 pts
72Jefferson County19.3-0.3 pts
73Grainger County19.2-0.2 pts
74Weakley County19.10 pts
75Roane County19.1-0 pts
76Franklin County19.1-0.2 pts
77Trousdale County19.1+0.6 pts
78Hawkins County18.9-0.3 pts
79Sullivan County18.8-0.2 pts
80Claiborne County18.7-0.2 pts
81Jackson County18.6-0.3 pts
82Hardeman County18.6-0 pts
83Greene County18.5-0.4 pts
84Loudon County18.4+0.1 pts
85Polk County18.3-0 pts
86Washington County18-0.2 pts
87Pickett County17.7-0.3 pts
88Carter County17.5-0.2 pts
89Fayette County17.4-0.4 pts
90Wayne County17.3-0.1 pts
91Unicoi County17.2-0.3 pts
92Bledsoe County16.9-0.5 pts
93Cumberland County16.6-0.2 pts
94Johnson County16.4-0.3 pts
95Lake County16.30 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 Tennessee by population under 18, 2024) [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 Tennessee by population under 18, 2024. 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/tennessee-counties?period=2024. 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 Tennessee by population under 18, 2024. 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/tennessee-counties?period=2024.

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 Tennessee by population under 18, 2024 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/tennessee-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_tennessee_by_2024,
  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 Tennessee by population under 18, 2024}},
  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/tennessee-counties?period=2024. 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 Tennessee by population under 18, 2024
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/tennessee-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/tennessee-counties?period=2024.
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 Tennessee by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

Montgomery County, with 26.2% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Lake County, with 16.3% in 2024.

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 Tennessee: more rankings