Data / Rankings / Population under 18 / Counties in New Mexico

Counties in New Mexico by population under 18

Lea County had the highest population under 18 of 33 counties in 2014, at 30%. Catron County had the lowest, at 12.9%. The median was 23.3% and the figure for New Mexico was 24.2%. Source: the U.S. Census Bureau.

Highest30Lea County
Lowest12.9Catron County
Median23.333 counties
New Mexico24.2History

All counties, 2014

Lea County: 30 %Lea County30McKinley County: 29.7 %McKinley County29.7San Juan County: 28.1 %San Juan County28.1Chaves County: 27.4 %Chaves County27.4Curry County: 27.3 %Curry County27.3Eddy County: 26.2 %Eddy County26.2Doña Ana County: 25.6 %Doña Ana County25.6Luna County: 25.6 %Luna County25.6Roosevelt County: 25.3 %Roosevelt County25.3Sandoval County: 25 %Sandoval County25Valencia County: 24.8 %Valencia County24.8Cibola County: 24.5 %Cibola County24.5Otero County: 24 %Otero County24Rio Arriba County: 23.5 %Rio Arriba County23.5Hidalgo County: 23.4 %Hidalgo County23.4Los Alamos County: 23.4 %Los Alamos County23.4Socorro County: 23.3 %Socorro County23.3Bernalillo County: 23 %Bernalillo County23Torrance County: 21.8 %Torrance County21.8De Baca County: 21.4 %De Baca County21.4Quay County: 21.2 %Quay County21.2Grant County: 20.9 %Grant County20.9San Miguel County: 20.8 %San Miguel County20.8Guadalupe County: 20.7 %Guadalupe County20.7Santa Fe County: 19.6 %Santa Fe County19.6Colfax County: 19.4 %Colfax County19.4Taos County: 19.2 %Taos County19.2Mora County: 19.1 %Mora County19.1Union County: 18.8 %Union County18.8Lincoln County: 18.3 %Lincoln County18.3Harding County: 16.5 %Harding County16.5Sierra County: 15.5 %Sierra County15.5Catron County: 12.9 %Catron County12.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1Lea County30+0.2 pts
2McKinley County29.7-0 pts
3San Juan County28.1-0 pts
4Chaves County27.4-0.1 pts
5Curry County27.3-0.1 pts
6Eddy County26.2+0.2 pts
7Doña Ana County25.6-0.3 pts
8Luna County25.6+0.1 pts
9Roosevelt County25.3-0.4 pts
10Sandoval County25-0.4 pts
11Valencia County24.8-0.4 pts
12Cibola County24.5-0.1 pts
13Otero County24-0.2 pts
14Rio Arriba County23.5-0.2 pts
15Hidalgo County23.4-0.5 pts
16Los Alamos County23.4-0.2 pts
17Socorro County23.3-0 pts
18Bernalillo County23-0.3 pts
19Torrance County21.8-0.7 pts
20De Baca County21.4-0.4 pts
21Quay County21.2-0.4 pts
22Grant County20.9-0.3 pts
23San Miguel County20.8-0.4 pts
24Guadalupe County20.7-0 pts
25Santa Fe County19.6-0.4 pts
26Colfax County19.4-0.2 pts
27Taos County19.2-0.3 pts
28Mora County19.1-0.4 pts
29Union County18.8-0.2 pts
30Lincoln County18.3-0.2 pts
31Harding County16.5-0.1 pts
32Sierra County15.5-0.3 pts
33Catron County12.9-1.3 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 New Mexico by population under 18, 2014) [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 New Mexico by population under 18, 2014. 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/new-mexico-counties?period=2014. 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 New Mexico by population under 18, 2014. 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/new-mexico-counties?period=2014.

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 New Mexico by population under 18, 2014 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/new-mexico-counties?period=2014 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_new_mexico_2014,
  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 New Mexico by population under 18, 2014}},
  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/new-mexico-counties?period=2014. 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 New Mexico by population under 18, 2014
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/new-mexico-counties?period=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/new-mexico-counties?period=2014.
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?

Lea County, with 30% in 2014, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Catron County, with 12.9% in 2014.

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 New Mexico: more rankings