Counties in West Virginia by population under 18

Berkeley County had the highest population under 18 of 55 counties in 2021, at 23.3%. Gilmer County had the lowest, at 15.9%. The median was 19.8% and the figure for West Virginia was 20%. Source: the U.S. Census Bureau.

Highest23.3Berkeley County

Lowest15.9Gilmer County

Median19.855 counties

West Virginia20History

Map of counties, 2021

Under 18
18 to 19
19 to 20
20 to 21
21 and over

%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2021 (%)	Change on 2020
1	Berkeley County	23.3	-0.2 pts
2	Putnam County	22.2	-0.1 pts
3	Clay County	22.1	-0 pts
4	Lincoln County	22.1	-0.4 pts
5	Jefferson County	21.6	-0.5 pts
6	Jackson County	21.5	+0.2 pts
7	Mingo County	21.3	-0.2 pts
8	Harrison County	21.3	-0.1 pts
9	Wirt County	21.2	-0.2 pts
10	Wayne County	21.1	-0.4 pts
11	Raleigh County	20.9	0 pts
12	Boone County	20.7	-0.2 pts
13	Fayette County	20.7	-0.4 pts
14	Mason County	20.7	-0.1 pts
15	Wood County	20.7	-0.1 pts
16	Lewis County	20.6	-0 pts
17	Mercer County	20.5	+0.1 pts
18	Upshur County	20.5	-0.3 pts
19	Mineral County	20.4	0 pts
20	Monroe County	20.4	0 pts
21	Barbour County	20.4	+0.2 pts
22	Tyler County	20.3	+0.1 pts
23	Hardy County	20.2	-0.7 pts
24	Wyoming County	20	-0.4 pts
25	Marion County	20	-0.2 pts
26	Wetzel County	20	+0.1 pts
27	Roane County	20	-0.3 pts
28	Logan County	19.8	-0.2 pts
29	Taylor County	19.8	-0.5 pts
30	Nicholas County	19.7	-0.1 pts
31	Calhoun County	19.7	+0.1 pts
32	Ritchie County	19.6	-0.1 pts
33	Webster County	19.6	-0.1 pts
34	Kanawha County	19.4	-0.2 pts
35	Cabell County	19.3	-0.1 pts
36	Ohio County	19.2	-0.1 pts
37	Greenbrier County	19.2	-0.3 pts
38	Grant County	19.1	-0.1 pts
39	Hampshire County	19.1	-0.1 pts
40	Marshall County	18.9	-0.1 pts
41	Braxton County	18.8	-0.4 pts
42	Randolph County	18.7	-0 pts
43	Preston County	18.6	-0.1 pts
44	Pleasants County	18.5	-0.2 pts
45	Hancock County	18.1	-0.3 pts
46	McDowell County	17.9	-0.3 pts
47	Pendleton County	17.8	0 pts
48	Morgan County	17.6	-0.1 pts
49	Tucker County	17.6	-0.5 pts
50	Pocahontas County	17.3	+0.1 pts
51	Brooke County	17.3	-0.4 pts
52	Summers County	17.2	-0 pts
53	Doddridge County	17.1	-0.3 pts
54	Monongalia County	16.7	-0.1 pts
55	Gilmer County	15.9	+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 West Virginia 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 West Virginia 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/west-virginia-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 West Virginia 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/west-virginia-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 West Virginia 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/west-virginia-counties?period=2021 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_west_virginia_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 West Virginia 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/west-virginia-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 West Virginia 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/west-virginia-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/west-virginia-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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Questions

Which county has the highest population under 18?

Berkeley County, with 23.3% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Gilmer County, with 15.9% 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.