Data / Rankings / Population under 18 / Counties in Tennessee

Counties in Tennessee by population under 18

Williamson County had the highest population under 18 of 95 counties in 2017, at 28.3%. Lake County had the lowest, at 15.1%. The median was 21.2% and the figure for Tennessee was 22.5%. Source: the U.S. Census Bureau.

Highest28.3Williamson County
Lowest15.1Lake County
Median21.295 counties
Tennessee22.5History

Top 40 counties, 2017

Williamson County: 28.3 %Williamson County28.3Montgomery County: 27.2 %Montgomery County27.2Bedford County: 25.4 %Bedford County25.4Rutherford County: 25.3 %Rutherford County25.3Tipton County: 25.2 %Tipton County25.2Lawrence County: 24.8 %Lawrence County24.8Scott County: 24.7 %Scott County24.7Shelby County: 24.6 %Shelby County24.6Macon County: 24.5 %Macon County24.5Gibson County: 24.4 %Gibson County24.4Robertson County: 24.4 %Robertson County24.4Dyer County: 24.3 %Dyer County24.3Sumner County: 24.1 %Sumner County24.1Wilson County: 24.1 %Wilson County24.1Crockett County: 23.9 %Crockett County23.9Marshall County: 23.8 %Marshall County23.8Warren County: 23.7 %Warren County23.7Maury County: 23.4 %Maury County23.4Smith County: 23.3 %Smith County23.3Hamblen County: 23.3 %Hamblen County23.3Dickson County: 23.1 %Dickson County23.1Coffee County: 23.1 %Coffee County23.1Haywood County: 23.1 %Haywood County23.1Lauderdale County: 23 %Lauderdale County23Union County: 22.8 %Union County22.8Henderson County: 22.8 %Henderson County22.8Rhea County: 22.6 %Rhea County22.6Humphreys County: 22.6 %Humphreys County22.6Madison County: 22.4 %Madison County22.4Chester County: 22.3 %Chester County22.3Lincoln County: 22.3 %Lincoln County22.3Cheatham County: 22.3 %Cheatham County22.3DeKalb County: 22.2 %DeKalb County22.2White County: 22.2 %White County22.2Bradley County: 22.1 %Bradley County22.1Lewis County: 22.1 %Lewis County22.1Houston County: 22 %Houston County22Obion County: 22 %Obion County22Overton County: 21.8 %Overton County21.8Monroe County: 21.7 %Monroe County21.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Williamson County28.3-0.1 pts
2Montgomery County27.2-0.1 pts
3Bedford County25.4-0.1 pts
4Rutherford County25.3-0.2 pts
5Tipton County25.2-0.1 pts
6Lawrence County24.8-0.1 pts
7Scott County24.70 pts
8Shelby County24.6-0.2 pts
9Macon County24.5+0.2 pts
10Gibson County24.4+0.1 pts
11Robertson County24.4-0.4 pts
12Dyer County24.3-0.1 pts
13Sumner County24.1-0.2 pts
14Wilson County24.1-0.2 pts
15Crockett County23.9-0.1 pts
16Marshall County23.80 pts
17Warren County23.7-0.1 pts
18Maury County23.4-0 pts
19Smith County23.3-0.2 pts
20Hamblen County23.3-0.1 pts
21Dickson County23.1-0.2 pts
22Coffee County23.1-0.3 pts
23Haywood County23.1-0.2 pts
24Lauderdale County23-1 pts
25Union County22.8-0.1 pts
26Henderson County22.8-0.2 pts
27Rhea County22.6-0.2 pts
28Humphreys County22.6+0.1 pts
29Madison County22.4-0.2 pts
30Chester County22.3-0.3 pts
31Lincoln County22.3-0 pts
32Cheatham County22.3-0.2 pts
33DeKalb County22.2-0.1 pts
34White County22.2-0.2 pts
35Bradley County22.1-0.2 pts
36Lewis County22.1-0.3 pts
37Houston County220 pts
38Obion County22-0.1 pts
39Overton County21.8-0.2 pts
40Monroe County21.7-0.2 pts
41McNairy County21.7-0.2 pts
42Grundy County21.5-0.1 pts
43McMinn County21.5-0 pts
44Hancock County21.5+0.2 pts
45Sequatchie County21.4-0.4 pts
46Knox County21.3-0.1 pts
47Hickman County21.3-0.4 pts
48Meigs County21.2-0.4 pts
49Fentress County21.2-0.4 pts
50Cannon County21.20 pts
51Hamilton County21.2-0.1 pts
52Giles County21.2+0.2 pts
53Anderson County21.1+0.1 pts
54Putnam County21.10 pts
55Stewart County21.1-0.2 pts
56Grainger County210 pts
57Perry County20.9-0.2 pts
58Henry County20.9-0.1 pts
59Marion County20.9-0 pts
60Davidson County20.9-0.3 pts
61Blount County20.9-0.2 pts
62Campbell County20.8-0.2 pts
63Carroll County20.8-0 pts
64Sevier County20.7-0.2 pts
65Moore County20.7-0.1 pts
66Decatur County20.7-0.5 pts
67Jefferson County20.7-0.2 pts
68Hawkins County20.6-0.4 pts
69Hardin County20.5-0.1 pts
70Van Buren County20.5+0.1 pts
71Clay County20.4-0.4 pts
72Franklin County20.3-0.4 pts
73Fayette County20.2-0.3 pts
74Morgan County20.1-0.2 pts
75Cocke County20-0.1 pts
76Greene County20-0 pts
77Weakley County19.7-0.1 pts
78Polk County19.7-0.2 pts
79Sullivan County19.6-0.1 pts
80Roane County19.6-0.1 pts
81Pickett County19.5-0.2 pts
82Washington County19.4-0.2 pts
83Benton County19.3-0.4 pts
84Carter County19.3-0.2 pts
85Loudon County19.3-0.2 pts
86Hardeman County19.2-0.1 pts
87Claiborne County19.2-0.2 pts
88Unicoi County18.6+0.1 pts
89Jackson County18.6-0.4 pts
90Wayne County18.4-0.2 pts
91Bledsoe County17.9-0.3 pts
92Cumberland County17.9-0.2 pts
93Trousdale County17.8-1.4 pts
94Johnson County17.3-0.5 pts
95Lake County15.1-0.1 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 Tennessee 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 Tennessee 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/tennessee-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 Tennessee 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/tennessee-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 Tennessee 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/tennessee-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_tennessee_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 Tennessee 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/tennessee-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 Tennessee 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/tennessee-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/tennessee-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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Questions

Which county has the highest population under 18?

Williamson County, with 28.3% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Lake County, with 15.1% 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 Tennessee: more rankings