Data / Rankings / Population under 18 / Counties in Louisiana

Counties in Louisiana by population under 18

St. Bernard Parish had the highest population under 18 of 64 counties in 2018, at 27.6%. West Feliciana Parish had the lowest, at 16.4%. The median was 23.6% and the figure for Louisiana was 23.6%. Source: the U.S. Census Bureau.

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Highest27.6St. Bernard Parish
Lowest16.4West Feliciana Parish
Median23.664 counties
Louisiana23.6History

Map of counties, 2018

Acadia Parish: 25.6 %Allen Parish: 22.9 %Ascension Parish: 27.4 %Assumption Parish: 21.6 %Avoyelles Parish: 23.2 %Beauregard Parish: 24.7 %Bienville Parish: 22.6 %Bossier Parish: 25.5 %Caddo Parish: 23.8 %Calcasieu Parish: 24.8 %Caldwell Parish: 23 %Cameron Parish: 22.8 %Catahoula Parish: 21.9 %Claiborne Parish: 18.8 %Concordia Parish: 24.4 %De Soto Parish: 24.1 %East Baton Rouge Parish: 22.4 %East Carroll Parish: 22.4 %East Feliciana Parish: 18 %Evangeline Parish: 24.7 %Franklin Parish: 24.6 %Grant Parish: 21.2 %Iberia Parish: 25.1 %Iberville Parish: 21 %Jackson Parish: 22.3 %Jefferson Parish: 21.9 %Jefferson Davis Parish: 25.6 %Lafayette Parish: 24 %Lafourche Parish: 23.7 %LaSalle Parish: 22.2 %Lincoln Parish: 20.5 %Livingston Parish: 26.2 %Madison Parish: 25.7 %Morehouse Parish: 22.6 %Natchitoches Parish: 22.5 %Orleans Parish: 20.5 %Ouachita Parish: 25.4 %Plaquemines Parish: 26.3 %Pointe Coupee Parish: 22.1 %Rapides Parish: 24.3 %Red River Parish: 25 %Richland Parish: 23.3 %Sabine Parish: 23.5 %St. Bernard Parish: 27.6 %St. Charles Parish: 24.8 %St. Helena Parish: 22.9 %St. James Parish: 23.5 %St. John the Baptist Parish: 24 %St. Landry Parish: 25.7 %St. Martin Parish: 24.3 %St. Mary Parish: 24.1 %St. Tammany Parish: 23.9 %Tangipahoa Parish: 24.1 %Tensas Parish: 22.8 %Terrebonne Parish: 25.2 %Union Parish: 21.7 %Vermilion Parish: 25.4 %Vernon Parish: 26.1 %Washington Parish: 23.6 %Webster Parish: 22.5 %West Baton Rouge Parish: 24.7 %West Carroll Parish: 22.9 %West Feliciana Parish: 16.4 %Winn Parish: 21 %
  • Under 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2018. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2018

St. Bernard Parish: 27.6 %St. Bernard Parish27.6Ascension Parish: 27.4 %Ascension Parish27.4Plaquemines Parish: 26.3 %Plaquemines Parish26.3Livingston Parish: 26.2 %Livingston Parish26.2Vernon Parish: 26.1 %Vernon Parish26.1St. Landry Parish: 25.7 %St. Landry Parish25.7Madison Parish: 25.7 %Madison Parish25.7Acadia Parish: 25.6 %Acadia Parish25.6Jefferson Davis Parish: 25.6 %Jefferson Davis Parish25.6Bossier Parish: 25.5 %Bossier Parish25.5Vermilion Parish: 25.4 %Vermilion Parish25.4Ouachita Parish: 25.4 %Ouachita Parish25.4Terrebonne Parish: 25.2 %Terrebonne Parish25.2Iberia Parish: 25.1 %Iberia Parish25.1Red River Parish: 25 %Red River Parish25St. Charles Parish: 24.8 %St. Charles Parish24.8Calcasieu Parish: 24.8 %Calcasieu Parish24.8Evangeline Parish: 24.7 %Evangeline Parish24.7Beauregard Parish: 24.7 %Beauregard Parish24.7West Baton Rouge Parish: 24.7 %West Baton Rouge Parish24.7Franklin Parish: 24.6 %Franklin Parish24.6Concordia Parish: 24.4 %Concordia Parish24.4St. Martin Parish: 24.3 %St. Martin Parish24.3Rapides Parish: 24.3 %Rapides Parish24.3St. Mary Parish: 24.1 %St. Mary Parish24.1Tangipahoa Parish: 24.1 %Tangipahoa Parish24.1De Soto Parish: 24.1 %De Soto Parish24.1Lafayette Parish: 24 %Lafayette Parish24St. John the Baptist Parish: 24 %St. John the Baptist Parish24St. Tammany Parish: 23.9 %St. Tammany Parish23.9Caddo Parish: 23.8 %Caddo Parish23.8Lafourche Parish: 23.7 %Lafourche Parish23.7Washington Parish: 23.6 %Washington Parish23.6Sabine Parish: 23.5 %Sabine Parish23.5St. James Parish: 23.5 %St. James Parish23.5Richland Parish: 23.3 %Richland Parish23.3Avoyelles Parish: 23.2 %Avoyelles Parish23.2Caldwell Parish: 23 %Caldwell Parish23Allen Parish: 22.9 %Allen Parish22.9West Carroll Parish: 22.9 %West Carroll Parish22.9St. Bernard Parish: 27.6 %St. Bernard Parish27.6Ascension Parish: 27.4 %Ascension Parish27.4Plaquemines Parish: 26.3 %Plaquemines Parish26.3Livingston Parish: 26.2 %Livingston Parish26.2Vernon Parish: 26.1 %Vernon Parish26.1St. Landry Parish: 25.7 %St. Landry Parish25.7Madison Parish: 25.7 %Madison Parish25.7Acadia Parish: 25.6 %Acadia Parish25.6Jefferson Davis Parish: 25.6 %Jefferson Davis Parish25.6Bossier Parish: 25.5 %Bossier Parish25.5Vermilion Parish: 25.4 %Vermilion Parish25.4Ouachita Parish: 25.4 %Ouachita Parish25.4Terrebonne Parish: 25.2 %Terrebonne Parish25.2Iberia Parish: 25.1 %Iberia Parish25.1Red River Parish: 25 %Red River Parish25St. Charles Parish: 24.8 %St. Charles Parish24.8Calcasieu Parish: 24.8 %Calcasieu Parish24.8Evangeline Parish: 24.7 %Evangeline Parish24.7Beauregard Parish: 24.7 %Beauregard Parish24.7West Baton Rouge Parish: 24.7 %West Baton Rouge Parish24.7Franklin Parish: 24.6 %Franklin Parish24.6Concordia Parish: 24.4 %Concordia Parish24.4St. Martin Parish: 24.3 %St. Martin Parish24.3Rapides Parish: 24.3 %Rapides Parish24.3St. Mary Parish: 24.1 %St. Mary Parish24.1Tangipahoa Parish: 24.1 %Tangipahoa Parish24.1De Soto Parish: 24.1 %De Soto Parish24.1Lafayette Parish: 24 %Lafayette Parish24St. John the Baptist Parish: 24 %St. John the Baptist Parish24St. Tammany Parish: 23.9 %St. Tammany Parish23.9Caddo Parish: 23.8 %Caddo Parish23.8Lafourche Parish: 23.7 %Lafourche Parish23.7Washington Parish: 23.6 %Washington Parish23.6Sabine Parish: 23.5 %Sabine Parish23.5St. James Parish: 23.5 %St. James Parish23.5Richland Parish: 23.3 %Richland Parish23.3Avoyelles Parish: 23.2 %Avoyelles Parish23.2Caldwell Parish: 23 %Caldwell Parish23Allen Parish: 22.9 %Allen Parish22.9West Carroll Parish: 22.9 %West Carroll Parish22.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2018 (%)Change on 2017
1St. Bernard Parish27.60 pts
2Ascension Parish27.4-0.2 pts
3Plaquemines Parish26.3+0.1 pts
4Livingston Parish26.2-0.2 pts
5Vernon Parish26.1+0.1 pts
6St. Landry Parish25.7-0.4 pts
7Madison Parish25.7+0.3 pts
8Acadia Parish25.6-0.4 pts
9Jefferson Davis Parish25.60 pts
10Bossier Parish25.5-0.1 pts
11Vermilion Parish25.4-0.3 pts
12Ouachita Parish25.4-0.1 pts
13Terrebonne Parish25.2-0.2 pts
14Iberia Parish25.1-0.4 pts
15Red River Parish25+0.5 pts
16St. Charles Parish24.8-0.2 pts
17Calcasieu Parish24.8-0.1 pts
18Evangeline Parish24.7-0.3 pts
19Beauregard Parish24.7+0.1 pts
20West Baton Rouge Parish24.70 pts
21Franklin Parish24.6-0.3 pts
22Concordia Parish24.4-0 pts
23St. Martin Parish24.3-0.5 pts
24Rapides Parish24.3-0.2 pts
25St. Mary Parish24.1-0.2 pts
26Tangipahoa Parish24.1-0.2 pts
27De Soto Parish24.1-0.2 pts
28Lafayette Parish24-0 pts
29St. John the Baptist Parish24-0.4 pts
30St. Tammany Parish23.9-0.3 pts
31Caddo Parish23.8-0.3 pts
32Lafourche Parish23.7-0 pts
33Washington Parish23.6-0.2 pts
34Sabine Parish23.5-0.2 pts
34St. James Parish23.5-0.1 pts
36Richland Parish23.3-0.4 pts
37Avoyelles Parish23.2-0.2 pts
38Caldwell Parish23-0.1 pts
39Allen Parish22.9+0.1 pts
40West Carroll Parish22.9-0.3 pts
41St. Helena Parish22.9+0.1 pts
42Cameron Parish22.8+0.2 pts
43Tensas Parish22.8-1.3 pts
44Bienville Parish22.6-0.3 pts
45Morehouse Parish22.6-0.3 pts
46Natchitoches Parish22.5-0.5 pts
47Webster Parish22.5-0.2 pts
48East Carroll Parish22.4-0.6 pts
49East Baton Rouge Parish22.4-0.2 pts
50Jackson Parish22.3+0.1 pts
51LaSalle Parish22.2-0.1 pts
52Pointe Coupee Parish22.1-0.5 pts
53Jefferson Parish21.9-0.1 pts
54Catahoula Parish21.9-0.5 pts
55Union Parish21.7-0.3 pts
56Assumption Parish21.6-0.4 pts
57Grant Parish21.2+0.2 pts
58Winn Parish21-0.3 pts
59Iberville Parish21-0.3 pts
60Orleans Parish20.5-0 pts
61Lincoln Parish20.5-0.1 pts
62Claiborne Parish18.8-0.2 pts
63East Feliciana Parish18-0.1 pts
64West Feliciana Parish16.4+0.1 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, 2018) [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, 2018. 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=2018. 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, 2018. 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=2018.

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, 2018 [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=2018 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_louisiana_by_2018,
  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, 2018}},
  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=2018. 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, 2018
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=2018
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/louisiana-counties?period=2018.
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?

St. Bernard Parish, with 27.6% in 2018, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

West Feliciana Parish, with 16.4% in 2018.

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