Data / Rankings / Population under 18 / Counties in Tennessee

Counties in Tennessee by population under 18, 2025

Montgomery County had the highest population under 18 of 95 counties in 2025, at 25.8%. Johnson County had the lowest, at 16%. The median was 20.6% and the figure for Tennessee was 21.5%. Source: the U.S. Census Bureau.

Highest25.8Montgomery County
Lowest16Johnson County
Median20.695 counties
Tennessee21.5History

Top 40 counties, 2025

Montgomery County: 25.8 %Montgomery County25.8Williamson County: 24.5 %Williamson County24.5Macon County: 24.5 %Macon County24.5Shelby County: 24.4 %Shelby County24.4Bedford County: 24.4 %Bedford County24.4Lawrence County: 24.2 %Lawrence County24.2Rutherford County: 24.2 %Rutherford County24.2Dyer County: 23.6 %Dyer County23.6Gibson County: 23.4 %Gibson County23.4Hamblen County: 23.2 %Hamblen County23.2Robertson County: 23.1 %Robertson County23.1Wilson County: 23.1 %Wilson County23.1Scott County: 23.1 %Scott County23.1Tipton County: 23 %Tipton County23Crockett County: 23 %Crockett County23Marshall County: 22.9 %Marshall County22.9Coffee County: 22.7 %Coffee County22.7Smith County: 22.5 %Smith County22.5Warren County: 22.3 %Warren County22.3Sumner County: 22.2 %Sumner County22.2Madison County: 22.1 %Madison County22.1Maury County: 22 %Maury County22Perry County: 22 %Perry County22Chester County: 21.9 %Chester County21.9Lewis County: 21.9 %Lewis County21.9Henderson County: 21.8 %Henderson County21.8Dickson County: 21.8 %Dickson County21.8Lincoln County: 21.7 %Lincoln County21.7DeKalb County: 21.5 %DeKalb County21.5Bradley County: 21.4 %Bradley County21.4Obion County: 21.4 %Obion County21.4McMinn County: 21.4 %McMinn County21.4Grundy County: 21.2 %Grundy County21.2Cannon County: 21.2 %Cannon County21.2Carroll County: 21.1 %Carroll County21.1White County: 21 %White County21Union County: 21 %Union County21McNairy County: 21 %McNairy County21Van Buren County: 21 %Van Buren County21Haywood County: 20.9 %Haywood County20.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2025 (%)Change on 2024
1Montgomery County25.8-0.4 pts
2Williamson County24.5-0.7 pts
3Macon County24.5+0.1 pts
4Shelby County24.4-0 pts
5Bedford County24.4-0.4 pts
6Lawrence County24.2-0.4 pts
7Rutherford County24.2-0.3 pts
8Dyer County23.6-0.3 pts
9Gibson County23.4-0.2 pts
10Hamblen County23.2-0 pts
11Robertson County23.1-0.3 pts
12Wilson County23.1-0.2 pts
13Scott County23.1-0.3 pts
14Tipton County23-0.2 pts
15Crockett County23+0.1 pts
16Marshall County22.9-0.4 pts
17Coffee County22.7-0.2 pts
18Smith County22.5-0.2 pts
19Warren County22.3-0.4 pts
20Sumner County22.2-0.4 pts
21Madison County22.1+0.1 pts
22Maury County22-0.1 pts
23Perry County22+0.2 pts
24Chester County21.90 pts
25Lewis County21.9-0.1 pts
26Henderson County21.8-0.3 pts
27Dickson County21.8-0.2 pts
28Lincoln County21.7-0.2 pts
29DeKalb County21.5-0.3 pts
30Bradley County21.4-0.1 pts
31Obion County21.4-0.1 pts
32McMinn County21.4-0.1 pts
33Grundy County21.2-0.2 pts
34Cannon County21.2-0.1 pts
35Carroll County21.10 pts
36White County21-0.2 pts
37Union County21-0.3 pts
38McNairy County21-0 pts
39Van Buren County21+0.4 pts
40Haywood County20.9-0.3 pts
41Lauderdale County20.8-0.4 pts
42Hamilton County20.8-0.2 pts
43Hickman County20.7-0.2 pts
44Rhea County20.7-0.2 pts
45Humphreys County20.7-0.4 pts
46Stewart County20.6-0.1 pts
47Putnam County20.6-0.3 pts
48Overton County20.6-0 pts
49Anderson County20.5-0.3 pts
50Houston County20.5-0.7 pts
51Cheatham County20.5-0.3 pts
52Knox County20.5-0.2 pts
53Sevier County20.4-0.1 pts
54Campbell County20.2-0.3 pts
55Hancock County20.1-0.3 pts
56Meigs County20.1-0.4 pts
57Fentress County20-0.3 pts
58Giles County19.9-0.3 pts
59Davidson County19.90 pts
60Monroe County19.9-0.4 pts
61Hardin County19.7+0.1 pts
62Morgan County19.7-0.2 pts
63Cocke County19.6-0.2 pts
64Decatur County19.6-0 pts
65Henry County19.6-0.1 pts
66Blount County19.5-0.3 pts
67Marion County19.4-0.3 pts
68Benton County19.4-0.1 pts
69Sequatchie County19.3-0.3 pts
70Jefferson County19.2-0.2 pts
71Moore County19.1-0.4 pts
72Weakley County19.1-0 pts
73Franklin County19.1-0 pts
74Grainger County19-0.2 pts
75Clay County19-0.6 pts
76Roane County18.9-0.2 pts
77Claiborne County18.8+0.1 pts
78Sullivan County18.7-0.1 pts
79Hawkins County18.6-0.3 pts
80Trousdale County18.6-0.5 pts
81Hardeman County18.5-0.1 pts
82Jackson County18.4-0.3 pts
83Greene County18.3-0.3 pts
84Loudon County18.1-0.3 pts
85Polk County17.9-0.4 pts
86Washington County17.7-0.3 pts
87Pickett County17.6-0 pts
88Fayette County17.2-0.2 pts
89Wayne County17.1-0.2 pts
90Carter County17.1-0.4 pts
91Unicoi County16.8-0.4 pts
92Cumberland County16.6-0 pts
93Lake County16.5+0.2 pts
94Bledsoe County16.3-0.7 pts
95Johnson County16-0.4 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.

Use this data in your AI agent

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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 25.8% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Johnson County, with 16% in 2025.

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