Counties in West Virginia by population under 18

Berkeley County had the highest population under 18 of 55 counties in 2020, at 23.5%. Gilmer County had the lowest, at 15.6%. The median was 20% and the figure for West Virginia was 20.2%. Source: the U.S. Census Bureau.

Highest23.5Berkeley County

Lowest15.6Gilmer County

Median2055 counties

West Virginia20.2History

Map of counties, 2020

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

%, 2020. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2020

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

Full ranking

Rank	Counties	2020 (%)	Change on 2019
1	Berkeley County	23.5	-0.2 pts
2	Lincoln County	22.5	+0.1 pts
3	Putnam County	22.3	-0.4 pts
4	Clay County	22.2	+0.4 pts
5	Jefferson County	22	-0.3 pts
6	Mingo County	21.5	+0.4 pts
7	Wayne County	21.5	-0.3 pts
8	Wirt County	21.4	+0.2 pts
9	Harrison County	21.4	+0.2 pts
10	Jackson County	21.4	-0 pts
11	Fayette County	21.1	+0.4 pts
12	Boone County	20.9	-0 pts
13	Raleigh County	20.9	+0.1 pts
14	Hardy County	20.9	-0.6 pts
15	Upshur County	20.8	+0.1 pts
16	Mason County	20.8	+0.2 pts
17	Wood County	20.7	0 pts
18	Lewis County	20.6	-0 pts
19	Mercer County	20.5	+0.2 pts
20	Wyoming County	20.4	-0.5 pts
21	Mineral County	20.4	-0 pts
22	Monroe County	20.4	+0.3 pts
23	Taylor County	20.3	-0.1 pts
24	Roane County	20.2	-0.4 pts
25	Barbour County	20.2	-0.1 pts
26	Tyler County	20.2	+0.1 pts
27	Marion County	20.2	-0 pts
28	Logan County	20	+0.2 pts
29	Wetzel County	19.9	+0.6 pts
30	Nicholas County	19.8	-0.1 pts
31	Ritchie County	19.7	+0.5 pts
32	Webster County	19.7	-0.1 pts
33	Calhoun County	19.6	+0.1 pts
34	Kanawha County	19.6	-0.1 pts
35	Greenbrier County	19.4	+0.1 pts
36	Ohio County	19.3	+0.3 pts
37	Cabell County	19.3	+0.2 pts
38	Grant County	19.3	+0.4 pts
39	Hampshire County	19.2	-0.4 pts
40	Braxton County	19.2	-0.1 pts
41	Marshall County	19.1	-0.3 pts
42	Pleasants County	18.7	-0 pts
43	Randolph County	18.7	+0.1 pts
44	Preston County	18.7	-0.2 pts
45	Hancock County	18.4	-0.4 pts
46	McDowell County	18.2	+0.3 pts
47	Tucker County	18.1	-0.4 pts
48	Pendleton County	17.8	+0.7 pts
49	Morgan County	17.7	-0.6 pts
50	Brooke County	17.7	-0 pts
51	Doddridge County	17.5	0 pts
52	Pocahontas County	17.3	+0.3 pts
53	Summers County	17.2	-0.5 pts
54	Monongalia County	16.8	-0.1 pts
55	Gilmer County	15.6	+0.3 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, 2020) [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, 2020. 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=2020. 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, 2020. 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=2020.

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, 2020 [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=2020 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_west_virginia_2020,
  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, 2020}},
  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=2020. 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, 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/west-virginia-counties?period=2020.
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 23.5% in 2020, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Gilmer County, with 15.6% in 2020.

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.