Data / Rankings / Population under 18 / Counties in Alabama

Counties in Alabama by population under 18

Franklin County had the highest population under 18 of 67 counties in 2021, at 25.4%. Coosa County had the lowest, at 16.9%. The median was 21.5% and the figure for Alabama was 22%. Source: the U.S. Census Bureau.

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Highest25.4Franklin County
Lowest16.9Coosa County
Median21.567 counties
Alabama22History

Map of counties, 2021

Autauga County: 23.9 %Baldwin County: 21.2 %Barbour County: 20.2 %Bibb County: 21.1 %Blount County: 23 %Bullock County: 19.8 %Butler County: 22.2 %Calhoun County: 20.9 %Chambers County: 20.1 %Cherokee County: 19.2 %Chilton County: 23.3 %Choctaw County: 19.5 %Clarke County: 21 %Clay County: 20.3 %Cleburne County: 23.4 %Coffee County: 24 %Colbert County: 21.2 %Conecuh County: 19.3 %Coosa County: 16.9 %Covington County: 21.8 %Crenshaw County: 22.3 %Cullman County: 22.1 %Dale County: 23.1 %Dallas County: 22.7 %DeKalb County: 24.3 %Elmore County: 21.4 %Escambia County: 22.4 %Etowah County: 21.6 %Fayette County: 21.7 %Franklin County: 25.4 %Geneva County: 21.8 %Greene County: 21.7 %Hale County: 23 %Henry County: 20.4 %Houston County: 22.7 %Jackson County: 20.6 %Jefferson County: 22 %Lamar County: 21.2 %Lauderdale County: 19.7 %Lawrence County: 21.7 %Lee County: 21.2 %Limestone County: 22.6 %Lowndes County: 20 %Macon County: 17 %Madison County: 21.5 %Marengo County: 22.1 %Marion County: 20.8 %Marshall County: 25.3 %Mobile County: 23.2 %Monroe County: 21.1 %Montgomery County: 23.1 %Morgan County: 22.7 %Perry County: 20.5 %Pickens County: 19.7 %Pike County: 19 %Randolph County: 21.5 %Russell County: 24.4 %St. Clair County: 22.8 %Shelby County: 23 %Sumter County: 20 %Talladega County: 20.8 %Tallapoosa County: 19.9 %Tuscaloosa County: 19.9 %Walker County: 21.5 %Washington County: 21.6 %Wilcox County: 21.6 %Winston County: 20.4 %
  • Under 20
  • 20 to 21
  • 21 to 22
  • 22 to 23
  • 23 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Franklin County: 25.4 %Franklin County25.4Marshall County: 25.3 %Marshall County25.3Russell County: 24.4 %Russell County24.4DeKalb County: 24.3 %DeKalb County24.3Coffee County: 24 %Coffee County24Autauga County: 23.9 %Autauga County23.9Cleburne County: 23.4 %Cleburne County23.4Chilton County: 23.3 %Chilton County23.3Mobile County: 23.2 %Mobile County23.2Dale County: 23.1 %Dale County23.1Montgomery County: 23.1 %Montgomery County23.1Shelby County: 23 %Shelby County23Blount County: 23 %Blount County23Hale County: 23 %Hale County23St. Clair County: 22.8 %St. Clair County22.8Houston County: 22.7 %Houston County22.7Morgan County: 22.7 %Morgan County22.7Dallas County: 22.7 %Dallas County22.7Limestone County: 22.6 %Limestone County22.6Escambia County: 22.4 %Escambia County22.4Crenshaw County: 22.3 %Crenshaw County22.3Butler County: 22.2 %Butler County22.2Cullman County: 22.1 %Cullman County22.1Marengo County: 22.1 %Marengo County22.1Jefferson County: 22 %Jefferson County22Covington County: 21.8 %Covington County21.8Geneva County: 21.8 %Geneva County21.8Lawrence County: 21.7 %Lawrence County21.7Fayette County: 21.7 %Fayette County21.7Greene County: 21.7 %Greene County21.7Wilcox County: 21.6 %Wilcox County21.6Etowah County: 21.6 %Etowah County21.6Washington County: 21.6 %Washington County21.6Randolph County: 21.5 %Randolph County21.5Madison County: 21.5 %Madison County21.5Walker County: 21.5 %Walker County21.5Elmore County: 21.4 %Elmore County21.4Lamar County: 21.2 %Lamar County21.2Colbert County: 21.2 %Colbert County21.2Lee County: 21.2 %Lee County21.2Franklin County: 25.4 %Franklin County25.4Marshall County: 25.3 %Marshall County25.3Russell County: 24.4 %Russell County24.4DeKalb County: 24.3 %DeKalb County24.3Coffee County: 24 %Coffee County24Autauga County: 23.9 %Autauga County23.9Cleburne County: 23.4 %Cleburne County23.4Chilton County: 23.3 %Chilton County23.3Mobile County: 23.2 %Mobile County23.2Dale County: 23.1 %Dale County23.1Montgomery County: 23.1 %Montgomery County23.1Shelby County: 23 %Shelby County23Blount County: 23 %Blount County23Hale County: 23 %Hale County23St. Clair County: 22.8 %St. Clair County22.8Houston County: 22.7 %Houston County22.7Morgan County: 22.7 %Morgan County22.7Dallas County: 22.7 %Dallas County22.7Limestone County: 22.6 %Limestone County22.6Escambia County: 22.4 %Escambia County22.4Crenshaw County: 22.3 %Crenshaw County22.3Butler County: 22.2 %Butler County22.2Cullman County: 22.1 %Cullman County22.1Marengo County: 22.1 %Marengo County22.1Jefferson County: 22 %Jefferson County22Covington County: 21.8 %Covington County21.8Geneva County: 21.8 %Geneva County21.8Lawrence County: 21.7 %Lawrence County21.7Fayette County: 21.7 %Fayette County21.7Greene County: 21.7 %Greene County21.7Wilcox County: 21.6 %Wilcox County21.6Etowah County: 21.6 %Etowah County21.6Washington County: 21.6 %Washington County21.6Randolph County: 21.5 %Randolph County21.5Madison County: 21.5 %Madison County21.5Walker County: 21.5 %Walker County21.5Elmore County: 21.4 %Elmore County21.4Lamar County: 21.2 %Lamar County21.2Colbert County: 21.2 %Colbert County21.2Lee County: 21.2 %Lee County21.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Franklin County25.4-0.2 pts
2Marshall County25.3+0.2 pts
3Russell County24.40 pts
4DeKalb County24.3-0.1 pts
5Coffee County24+0.3 pts
6Autauga County23.9-0.1 pts
7Cleburne County23.4+0.2 pts
8Chilton County23.3-0.2 pts
9Mobile County23.2-0.1 pts
10Dale County23.1+0.2 pts
11Montgomery County23.1+0.1 pts
12Shelby County23-0.3 pts
13Blount County23-0 pts
14Hale County23+0.3 pts
15St. Clair County22.8-0.1 pts
16Houston County22.7-0.2 pts
17Morgan County22.7+0.1 pts
18Dallas County22.7-0.2 pts
19Limestone County22.6-0.1 pts
20Escambia County22.4+0.2 pts
21Crenshaw County22.3-0.1 pts
22Butler County22.2+0.2 pts
23Cullman County22.1-0.1 pts
24Marengo County22.10 pts
25Jefferson County22-0.1 pts
26Covington County21.80 pts
27Geneva County21.8-0.1 pts
28Lawrence County21.7+0.2 pts
29Fayette County21.70 pts
30Greene County21.7-0 pts
31Wilcox County21.6-0.5 pts
32Etowah County21.60 pts
33Washington County21.6-0 pts
34Randolph County21.50 pts
35Madison County21.5-0.2 pts
36Walker County21.5+0.2 pts
37Elmore County21.4-0.1 pts
38Lamar County21.2+0.1 pts
39Colbert County21.2+0.1 pts
40Lee County21.2-0.3 pts
41Baldwin County21.2-0.2 pts
42Bibb County21.1-0.1 pts
43Monroe County21.1-0.1 pts
44Clarke County21+0.1 pts
45Calhoun County20.9-0 pts
46Talladega County20.8-0.1 pts
47Marion County20.80 pts
48Jackson County20.60 pts
49Perry County20.5-0.3 pts
50Henry County20.4-0.1 pts
51Winston County20.4+0.1 pts
52Clay County20.30 pts
53Barbour County20.2-0.1 pts
54Chambers County20.10 pts
55Sumter County20+0.1 pts
56Lowndes County20-0.2 pts
57Tuscaloosa County19.9-0.5 pts
58Tallapoosa County19.9-0.2 pts
59Bullock County19.8+0.2 pts
60Lauderdale County19.7-0.1 pts
61Pickens County19.7-0 pts
62Choctaw County19.5-0.1 pts
63Conecuh County19.3-0.7 pts
64Cherokee County19.2-0 pts
65Pike County190 pts
66Macon County17-0 pts
67Coosa County16.9-0.2 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 Alabama by population under 18, 2021) [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 Alabama by population under 18, 2021. 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/alabama-counties?period=2021. 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 Alabama by population under 18, 2021. 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/alabama-counties?period=2021.

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 Alabama by population under 18, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/alabama-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_alabama_by_2021,
  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 Alabama by population under 18, 2021}},
  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/alabama-counties?period=2021. 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 Alabama by population under 18, 2021
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/alabama-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/alabama-counties?period=2021.
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 Alabama by population under 18 using official data, and cite the source.
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Questions

Which county has the highest population under 18?

Franklin County, with 25.4% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Coosa County, with 16.9% in 2021.

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 Alabama: more rankings