Data / Rankings / Population under 18 / Counties in Louisiana

Counties in Louisiana by population under 18

Ascension Parish had the highest population under 18 of 64 counties in 2015, at 27.8%. West Feliciana Parish had the lowest, at 16.4%. The median was 24.2% and the figure for Louisiana was 23.9%. Source: the U.S. Census Bureau.

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Highest27.8Ascension Parish
Lowest16.4West Feliciana Parish
Median24.264 counties
Louisiana23.9History

Map of counties, 2015

Acadia Parish: 26.5 %Allen Parish: 22.9 %Ascension Parish: 27.8 %Assumption Parish: 22.4 %Avoyelles Parish: 23.6 %Beauregard Parish: 24.7 %Bienville Parish: 22.8 %Bossier Parish: 25.6 %Caddo Parish: 24.3 %Calcasieu Parish: 24.8 %Caldwell Parish: 23.1 %Cameron Parish: 23.1 %Catahoula Parish: 22.8 %Claiborne Parish: 18.9 %Concordia Parish: 24.4 %De Soto Parish: 24.5 %East Baton Rouge Parish: 22.7 %East Carroll Parish: 23.5 %East Feliciana Parish: 18.9 %Evangeline Parish: 25.7 %Franklin Parish: 24.9 %Grant Parish: 21.3 %Iberia Parish: 26.1 %Iberville Parish: 21.6 %Jackson Parish: 22.4 %Jefferson Parish: 21.9 %Jefferson Davis Parish: 25.7 %Lafayette Parish: 24.2 %Lafourche Parish: 23.8 %LaSalle Parish: 22.8 %Lincoln Parish: 20.6 %Livingston Parish: 26.6 %Madison Parish: 25.3 %Morehouse Parish: 23.5 %Natchitoches Parish: 23.1 %Orleans Parish: 20.7 %Ouachita Parish: 25.8 %Plaquemines Parish: 26.8 %Pointe Coupee Parish: 22.9 %Rapides Parish: 24.9 %Red River Parish: 24.7 %Richland Parish: 24.5 %Sabine Parish: 24.1 %St. Bernard Parish: 27.8 %St. Charles Parish: 25.5 %St. Helena Parish: 23.2 %St. James Parish: 23.7 %St. John the Baptist Parish: 24.6 %St. Landry Parish: 26.3 %St. Martin Parish: 25.1 %St. Mary Parish: 24.7 %St. Tammany Parish: 24.4 %Tangipahoa Parish: 24.4 %Tensas Parish: 24.8 %Terrebonne Parish: 25.7 %Union Parish: 22.5 %Vermilion Parish: 26.1 %Vernon Parish: 26.1 %Washington Parish: 23.9 %Webster Parish: 22.8 %West Baton Rouge Parish: 24.7 %West Carroll Parish: 23.8 %West Feliciana Parish: 16.4 %Winn Parish: 21.7 %
  • Under 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 to 26
  • 26 and over
%, 2015. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2015

Ascension Parish: 27.8 %Ascension Parish27.8St. Bernard Parish: 27.8 %St. Bernard Parish27.8Plaquemines Parish: 26.8 %Plaquemines Parish26.8Livingston Parish: 26.6 %Livingston Parish26.6Acadia Parish: 26.5 %Acadia Parish26.5St. Landry Parish: 26.3 %St. Landry Parish26.3Iberia Parish: 26.1 %Iberia Parish26.1Vermilion Parish: 26.1 %Vermilion Parish26.1Vernon Parish: 26.1 %Vernon Parish26.1Ouachita Parish: 25.8 %Ouachita Parish25.8Jefferson Davis Parish: 25.7 %Jefferson Davis Parish25.7Evangeline Parish: 25.7 %Evangeline Parish25.7Terrebonne Parish: 25.7 %Terrebonne Parish25.7Bossier Parish: 25.6 %Bossier Parish25.6St. Charles Parish: 25.5 %St. Charles Parish25.5Madison Parish: 25.3 %Madison Parish25.3St. Martin Parish: 25.1 %St. Martin Parish25.1Franklin Parish: 24.9 %Franklin Parish24.9Rapides Parish: 24.9 %Rapides Parish24.9Tensas Parish: 24.8 %Tensas Parish24.8Calcasieu Parish: 24.8 %Calcasieu Parish24.8St. Mary Parish: 24.7 %St. Mary Parish24.7Beauregard Parish: 24.7 %Beauregard Parish24.7Red River Parish: 24.7 %Red River Parish24.7West Baton Rouge Parish: 24.7 %West Baton Rouge Parish24.7St. John the Baptist Parish: 24.6 %St. John the Baptist Parish24.6Richland Parish: 24.5 %Richland Parish24.5De Soto Parish: 24.5 %De Soto Parish24.5Concordia Parish: 24.4 %Concordia Parish24.4St. Tammany Parish: 24.4 %St. Tammany Parish24.4Tangipahoa Parish: 24.4 %Tangipahoa Parish24.4Caddo Parish: 24.3 %Caddo Parish24.3Lafayette Parish: 24.2 %Lafayette Parish24.2Sabine Parish: 24.1 %Sabine Parish24.1Washington Parish: 23.9 %Washington Parish23.9West Carroll Parish: 23.8 %West Carroll Parish23.8Lafourche Parish: 23.8 %Lafourche Parish23.8St. James Parish: 23.7 %St. James Parish23.7Avoyelles Parish: 23.6 %Avoyelles Parish23.6East Carroll Parish: 23.5 %East Carroll Parish23.5Ascension Parish: 27.8 %Ascension Parish27.8St. Bernard Parish: 27.8 %St. Bernard Parish27.8Plaquemines Parish: 26.8 %Plaquemines Parish26.8Livingston Parish: 26.6 %Livingston Parish26.6Acadia Parish: 26.5 %Acadia Parish26.5St. Landry Parish: 26.3 %St. Landry Parish26.3Iberia Parish: 26.1 %Iberia Parish26.1Vermilion Parish: 26.1 %Vermilion Parish26.1Vernon Parish: 26.1 %Vernon Parish26.1Ouachita Parish: 25.8 %Ouachita Parish25.8Jefferson Davis Parish: 25.7 %Jefferson Davis Parish25.7Evangeline Parish: 25.7 %Evangeline Parish25.7Terrebonne Parish: 25.7 %Terrebonne Parish25.7Bossier Parish: 25.6 %Bossier Parish25.6St. Charles Parish: 25.5 %St. Charles Parish25.5Madison Parish: 25.3 %Madison Parish25.3St. Martin Parish: 25.1 %St. Martin Parish25.1Franklin Parish: 24.9 %Franklin Parish24.9Rapides Parish: 24.9 %Rapides Parish24.9Tensas Parish: 24.8 %Tensas Parish24.8Calcasieu Parish: 24.8 %Calcasieu Parish24.8St. Mary Parish: 24.7 %St. Mary Parish24.7Beauregard Parish: 24.7 %Beauregard Parish24.7Red River Parish: 24.7 %Red River Parish24.7West Baton Rouge Parish: 24.7 %West Baton Rouge Parish24.7St. John the Baptist Parish: 24.6 %St. John the Baptist Parish24.6Richland Parish: 24.5 %Richland Parish24.5De Soto Parish: 24.5 %De Soto Parish24.5Concordia Parish: 24.4 %Concordia Parish24.4St. Tammany Parish: 24.4 %St. Tammany Parish24.4Tangipahoa Parish: 24.4 %Tangipahoa Parish24.4Caddo Parish: 24.3 %Caddo Parish24.3Lafayette Parish: 24.2 %Lafayette Parish24.2Sabine Parish: 24.1 %Sabine Parish24.1Washington Parish: 23.9 %Washington Parish23.9West Carroll Parish: 23.8 %West Carroll Parish23.8Lafourche Parish: 23.8 %Lafourche Parish23.8St. James Parish: 23.7 %St. James Parish23.7Avoyelles Parish: 23.6 %Avoyelles Parish23.6East Carroll Parish: 23.5 %East Carroll Parish23.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2015 (%)Change on 2014
1Ascension Parish27.8-0.1 pts
2St. Bernard Parish27.8+0.3 pts
3Plaquemines Parish26.8-0.1 pts
4Livingston Parish26.6-0.2 pts
5Acadia Parish26.5-0.1 pts
6St. Landry Parish26.3-0.2 pts
7Iberia Parish26.1-0.1 pts
8Vermilion Parish26.1-0.2 pts
9Vernon Parish26.1-0.7 pts
10Ouachita Parish25.8-0.1 pts
11Jefferson Davis Parish25.70 pts
12Evangeline Parish25.7-0.2 pts
13Terrebonne Parish25.70 pts
14Bossier Parish25.6-0.1 pts
15St. Charles Parish25.5-0.2 pts
16Madison Parish25.3+0.1 pts
17St. Martin Parish25.10 pts
18Franklin Parish24.9-0.1 pts
19Rapides Parish24.9-0.1 pts
20Tensas Parish24.8-0.1 pts
21Calcasieu Parish24.8-0.1 pts
22St. Mary Parish24.70 pts
23Beauregard Parish24.7-0.1 pts
24Red River Parish24.70 pts
25West Baton Rouge Parish24.7+0.3 pts
26St. John the Baptist Parish24.6-0.2 pts
27Richland Parish24.5-0.4 pts
28De Soto Parish24.5+0.1 pts
29Concordia Parish24.4-0.2 pts
30St. Tammany Parish24.4-0.2 pts
31Tangipahoa Parish24.4-0.1 pts
32Caddo Parish24.3-0.1 pts
33Lafayette Parish24.2+0.1 pts
34Sabine Parish24.1-0 pts
35Washington Parish23.9-0.1 pts
36West Carroll Parish23.8-0.5 pts
37Lafourche Parish23.80 pts
38St. James Parish23.7-0.4 pts
39Avoyelles Parish23.6-0.1 pts
40East Carroll Parish23.5-0.4 pts
41Morehouse Parish23.5-0.2 pts
42St. Helena Parish23.2-0.2 pts
43Natchitoches Parish23.1-0.3 pts
44Caldwell Parish23.1+0.2 pts
45Cameron Parish23.1+0.2 pts
46Allen Parish22.9-0.1 pts
47Pointe Coupee Parish22.9-0.2 pts
48Catahoula Parish22.8+0.2 pts
49Bienville Parish22.8+0.1 pts
50Webster Parish22.8-0.4 pts
51LaSalle Parish22.8+0.2 pts
52East Baton Rouge Parish22.7-0 pts
53Union Parish22.5-0 pts
54Jackson Parish22.4-0.1 pts
55Assumption Parish22.4-0.4 pts
56Jefferson Parish21.90 pts
57Winn Parish21.7-0.1 pts
58Iberville Parish21.6+0.1 pts
59Grant Parish21.3-0.6 pts
60Orleans Parish20.7-0 pts
61Lincoln Parish20.6+0.1 pts
62East Feliciana Parish18.9-0.4 pts
63Claiborne Parish18.9-0.1 pts
64West Feliciana Parish16.4-0.2 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 Louisiana by population under 18, 2015) [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 Louisiana by population under 18, 2015. 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/louisiana-counties?period=2015. 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 Louisiana by population under 18, 2015. 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/louisiana-counties?period=2015.

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 Louisiana by population under 18, 2015 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/louisiana-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_louisiana_by_2015,
  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 Louisiana by population under 18, 2015}},
  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/louisiana-counties?period=2015. 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 Louisiana by population under 18, 2015
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/louisiana-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/louisiana-counties?period=2015.
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?

Ascension Parish, with 27.8% in 2015, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

West Feliciana Parish, with 16.4% in 2015.

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 Louisiana: more rankings