Data / Population under 18 / Union Parish

Population under 18 in Union Parish

Population under 18 in Union Parish was 20.8% in 2025, according to the U.S. Census Bureau. That is down 0.3 pts from 2024. That is the 50th highest of 64 counties in 2025.

202520.8%
Change on 2024-0.3 pts
Rank50th of 64Counties in Louisiana ranked
Series high22.82010
Series low20.82025

Next release: Friday, 25 June 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

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Population under 18 in Union Parish, 2010 to 2025

20.52121.52222.5232010201320162019202220252010: 22.8 %2011: 22.8 %2012: 22.6 %2013: 22.4 %2014: 22.5 %2015: 22.5 %2016: 22.1 %2017: 22 %2018: 21.7 %2019: 21.3 %2020: 21.6 %2021: 21.6 %2022: 21.1 %2023: 21.1 %2024: 21.1 %2025: 20.8 %202122232010201620252010: 22.8 %2011: 22.8 %2012: 22.6 %2013: 22.4 %2014: 22.5 %2015: 22.5 %2016: 22.1 %2017: 22 %2018: 21.7 %2019: 21.3 %2020: 21.6 %2021: 21.6 %2022: 21.1 %2023: 21.1 %2024: 21.1 %2025: 20.8 %
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12, published 2026-06-25.
All 16 values
Period%
202520.8
202421.1
202321.1
202221.1
202121.6
202021.6
201921.3
201821.7
201722
201622.1
201522.5
201422.5
201322.4
201222.6
201122.8
201022.8

Compared with Louisiana and United States

Place2025
Union Parish20.8
Louisiana22.7
United States21.1

Union Parish compared with nearby places

Acadia Parish: 25.7 %Allen Parish: 21.9 %Ascension Parish: 25.4 %Assumption Parish: 19.4 %Avoyelles Parish: 23 %Beauregard Parish: 25 %Bienville Parish: 21.9 %Bossier Parish: 24.6 %Caddo Parish: 22.5 %Calcasieu Parish: 23.7 %Caldwell Parish: 22.3 %Cameron Parish: 22.6 %Catahoula Parish: 20.7 %Claiborne Parish: 18.4 %Concordia Parish: 22.6 %De Soto Parish: 23.7 %East Baton Rouge Parish: 21.9 %East Carroll Parish: 18.1 %East Feliciana Parish: 17 %Evangeline Parish: 23.8 %Franklin Parish: 23.6 %Grant Parish: 19.8 %Iberia Parish: 23.7 %Iberville Parish: 20.3 %Jackson Parish: 18.4 %Jefferson Parish: 21.8 %Jefferson Davis Parish: 24.5 %Lafayette Parish: 23.9 %Lafourche Parish: 22.5 %LaSalle Parish: 21.6 %Lincoln Parish: 19.7 %Livingston Parish: 25 %Madison Parish: 23.1 %Morehouse Parish: 21.5 %Natchitoches Parish: 21.4 %Orleans Parish: 19.5 %Ouachita Parish: 23.8 %Plaquemines Parish: 23.2 %Pointe Coupee Parish: 21 %Rapides Parish: 24.1 %Red River Parish: 24 %Richland Parish: 23.2 %Sabine Parish: 22.9 %St. Bernard Parish: 25.5 %St. Charles Parish: 23.2 %St. Helena Parish: 19.5 %St. James Parish: 21.8 %St. John the Baptist Parish: 22.7 %St. Landry Parish: 25.4 %St. Martin Parish: 23.6 %St. Mary Parish: 23.8 %St. Tammany Parish: 22.6 %Tangipahoa Parish: 23.8 %Tensas Parish: 19.1 %Terrebonne Parish: 23.6 %Union Parish: 20.8 %Vermilion Parish: 24.6 %Vernon Parish: 25.3 %Washington Parish: 22.7 %Webster Parish: 21.9 %West Baton Rouge Parish: 23.8 %West Carroll Parish: 22 %West Feliciana Parish: 15.7 %Winn Parish: 16.4 %
  • Under 20
  • 20 to 22
  • 22 to 23
  • 23 to 24
  • 24 and over
Population under 18, 2025, %. Union Parish is outlined. Same source and period for every area shown. Source: U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

Definition

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.

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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 (Population under 18, Union Parish, 2010 to 2025) [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, Population under 18, Union Parish, 2010 to 2025. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/en/population-under-18/union-parish-louisiana. 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. Population under 18, Union Parish, 2010 to 2025. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/en/population-under-18/union-parish-louisiana.

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, Population under 18, Union Parish, 2010 to 2025 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/en/population-under-18/union-parish-louisiana (Accessed: 12 October 2026).

BibTeX
@misc{census_population_under_18_union_2025,
  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: Population under 18, Union Parish, 2010 to 2025}},
  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/en/population-under-18/union-parish-louisiana. 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: Population under 18, Union Parish, 2010 to 2025
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/en/population-under-18/union-parish-louisiana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/population-under-18/union-parish-louisiana.
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

What is the population under 18 in Union Parish?

Population under 18 in Union Parish was 20.8% in 2025, according to the U.S. Census Bureau. That is down 0.3 pts from 2024. That is the 50th highest of 64 counties in 2025.

Where does this figure come from?

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 by Invokely on 2026-10-12.

What was the highest population under 18 in Union Parish?

22.8% in 2010, the highest value since 2010 in this series.

Related statistics for Union Parish

All statistics for Union Parish | Union Parish in figures