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 2019, at 27.5%. West Feliciana Parish had the lowest, at 16.4%. The median was 23.5% and the figure for Louisiana was 23.4%. Source: the U.S. Census Bureau.

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Highest27.5St. Bernard Parish
Lowest16.4West Feliciana Parish
Median23.564 counties
Louisiana23.4History

Map of counties, 2019

Acadia Parish: 25.5 %Allen Parish: 23.2 %Ascension Parish: 27.2 %Assumption Parish: 21.2 %Avoyelles Parish: 23 %Beauregard Parish: 24.7 %Bienville Parish: 22.5 %Bossier Parish: 25.6 %Caddo Parish: 23.5 %Calcasieu Parish: 24.8 %Caldwell Parish: 22.5 %Cameron Parish: 22.2 %Catahoula Parish: 22 %Claiborne Parish: 18.6 %Concordia Parish: 24.1 %De Soto Parish: 23.8 %East Baton Rouge Parish: 22.4 %East Carroll Parish: 21.5 %East Feliciana Parish: 17.4 %Evangeline Parish: 24.7 %Franklin Parish: 24.3 %Grant Parish: 21.1 %Iberia Parish: 24.8 %Iberville Parish: 20.7 %Jackson Parish: 21.9 %Jefferson Parish: 21.9 %Jefferson Davis Parish: 25.5 %Lafayette Parish: 24 %Lafourche Parish: 23.5 %LaSalle Parish: 21.7 %Lincoln Parish: 20.4 %Livingston Parish: 26.1 %Madison Parish: 25.7 %Morehouse Parish: 22.3 %Natchitoches Parish: 22 %Orleans Parish: 20.4 %Ouachita Parish: 25.1 %Plaquemines Parish: 26.2 %Pointe Coupee Parish: 21.9 %Rapides Parish: 24.1 %Red River Parish: 24.6 %Richland Parish: 23.1 %Sabine Parish: 22.9 %St. Bernard Parish: 27.5 %St. Charles Parish: 24.7 %St. Helena Parish: 22.6 %St. James Parish: 23.5 %St. John the Baptist Parish: 23.7 %St. Landry Parish: 25.3 %St. Martin Parish: 24.1 %St. Mary Parish: 24 %St. Tammany Parish: 23.7 %Tangipahoa Parish: 23.8 %Tensas Parish: 22.3 %Terrebonne Parish: 24.8 %Union Parish: 21.3 %Vermilion Parish: 25.1 %Vernon Parish: 25.5 %Washington Parish: 23.2 %Webster Parish: 22.1 %West Baton Rouge Parish: 24.5 %West Carroll Parish: 22.8 %West Feliciana Parish: 16.4 %Winn Parish: 20.8 %
  • Under 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2019. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2019

St. Bernard Parish: 27.5 %St. Bernard Parish27.5Ascension Parish: 27.2 %Ascension Parish27.2Plaquemines Parish: 26.2 %Plaquemines Parish26.2Livingston Parish: 26.1 %Livingston Parish26.1Madison Parish: 25.7 %Madison Parish25.7Bossier Parish: 25.6 %Bossier Parish25.6Jefferson Davis Parish: 25.5 %Jefferson Davis Parish25.5Acadia Parish: 25.5 %Acadia Parish25.5Vernon Parish: 25.5 %Vernon Parish25.5St. Landry Parish: 25.3 %St. Landry Parish25.3Vermilion Parish: 25.1 %Vermilion Parish25.1Ouachita Parish: 25.1 %Ouachita Parish25.1Terrebonne Parish: 24.8 %Terrebonne Parish24.8Calcasieu Parish: 24.8 %Calcasieu Parish24.8Iberia Parish: 24.8 %Iberia Parish24.8St. Charles Parish: 24.7 %St. Charles Parish24.7Beauregard Parish: 24.7 %Beauregard Parish24.7Evangeline Parish: 24.7 %Evangeline Parish24.7Red River Parish: 24.6 %Red River Parish24.6West Baton Rouge Parish: 24.5 %West Baton Rouge Parish24.5Franklin Parish: 24.3 %Franklin Parish24.3Rapides Parish: 24.1 %Rapides Parish24.1Concordia Parish: 24.1 %Concordia Parish24.1St. Martin Parish: 24.1 %St. Martin Parish24.1Lafayette Parish: 24 %Lafayette Parish24St. Mary Parish: 24 %St. Mary Parish24Tangipahoa Parish: 23.8 %Tangipahoa Parish23.8De Soto Parish: 23.8 %De Soto Parish23.8St. Tammany Parish: 23.7 %St. Tammany Parish23.7St. John the Baptist Parish: 23.7 %St. John the Baptist Parish23.7Caddo Parish: 23.5 %Caddo Parish23.5Lafourche Parish: 23.5 %Lafourche Parish23.5St. James Parish: 23.5 %St. James Parish23.5Allen Parish: 23.2 %Allen Parish23.2Washington Parish: 23.2 %Washington Parish23.2Richland Parish: 23.1 %Richland Parish23.1Avoyelles Parish: 23 %Avoyelles Parish23Sabine Parish: 22.9 %Sabine Parish22.9West Carroll Parish: 22.8 %West Carroll Parish22.8St. Helena Parish: 22.6 %St. Helena Parish22.6St. Bernard Parish: 27.5 %St. Bernard Parish27.5Ascension Parish: 27.2 %Ascension Parish27.2Plaquemines Parish: 26.2 %Plaquemines Parish26.2Livingston Parish: 26.1 %Livingston Parish26.1Madison Parish: 25.7 %Madison Parish25.7Bossier Parish: 25.6 %Bossier Parish25.6Jefferson Davis Parish: 25.5 %Jefferson Davis Parish25.5Acadia Parish: 25.5 %Acadia Parish25.5Vernon Parish: 25.5 %Vernon Parish25.5St. Landry Parish: 25.3 %St. Landry Parish25.3Vermilion Parish: 25.1 %Vermilion Parish25.1Ouachita Parish: 25.1 %Ouachita Parish25.1Terrebonne Parish: 24.8 %Terrebonne Parish24.8Calcasieu Parish: 24.8 %Calcasieu Parish24.8Iberia Parish: 24.8 %Iberia Parish24.8St. Charles Parish: 24.7 %St. Charles Parish24.7Beauregard Parish: 24.7 %Beauregard Parish24.7Evangeline Parish: 24.7 %Evangeline Parish24.7Red River Parish: 24.6 %Red River Parish24.6West Baton Rouge Parish: 24.5 %West Baton Rouge Parish24.5Franklin Parish: 24.3 %Franklin Parish24.3Rapides Parish: 24.1 %Rapides Parish24.1Concordia Parish: 24.1 %Concordia Parish24.1St. Martin Parish: 24.1 %St. Martin Parish24.1Lafayette Parish: 24 %Lafayette Parish24St. Mary Parish: 24 %St. Mary Parish24Tangipahoa Parish: 23.8 %Tangipahoa Parish23.8De Soto Parish: 23.8 %De Soto Parish23.8St. Tammany Parish: 23.7 %St. Tammany Parish23.7St. John the Baptist Parish: 23.7 %St. John the Baptist Parish23.7Caddo Parish: 23.5 %Caddo Parish23.5Lafourche Parish: 23.5 %Lafourche Parish23.5St. James Parish: 23.5 %St. James Parish23.5Allen Parish: 23.2 %Allen Parish23.2Washington Parish: 23.2 %Washington Parish23.2Richland Parish: 23.1 %Richland Parish23.1Avoyelles Parish: 23 %Avoyelles Parish23Sabine Parish: 22.9 %Sabine Parish22.9West Carroll Parish: 22.8 %West Carroll Parish22.8St. Helena Parish: 22.6 %St. Helena Parish22.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2019 (%)Change on 2018
1St. Bernard Parish27.5-0.1 pts
2Ascension Parish27.2-0.2 pts
3Plaquemines Parish26.2-0.2 pts
4Livingston Parish26.1-0.2 pts
5Madison Parish25.70 pts
6Bossier Parish25.6+0.1 pts
7Jefferson Davis Parish25.5-0.1 pts
8Acadia Parish25.5-0.1 pts
9Vernon Parish25.5-0.6 pts
10St. Landry Parish25.3-0.4 pts
11Vermilion Parish25.1-0.3 pts
12Ouachita Parish25.1-0.3 pts
13Terrebonne Parish24.8-0.3 pts
14Calcasieu Parish24.80 pts
15Iberia Parish24.8-0.3 pts
16St. Charles Parish24.7-0 pts
17Beauregard Parish24.70 pts
18Evangeline Parish24.7-0 pts
19Red River Parish24.6-0.5 pts
20West Baton Rouge Parish24.5-0.2 pts
21Franklin Parish24.3-0.3 pts
22Rapides Parish24.1-0.2 pts
23Concordia Parish24.1-0.4 pts
24St. Martin Parish24.1-0.3 pts
25Lafayette Parish24-0 pts
26St. Mary Parish24-0.1 pts
27Tangipahoa Parish23.8-0.3 pts
28De Soto Parish23.8-0.3 pts
29St. Tammany Parish23.7-0.1 pts
30St. John the Baptist Parish23.7-0.3 pts
31Caddo Parish23.5-0.3 pts
32Lafourche Parish23.5-0.2 pts
33St. James Parish23.50 pts
34Allen Parish23.2+0.3 pts
35Washington Parish23.2-0.4 pts
36Richland Parish23.1-0.1 pts
37Avoyelles Parish23-0.1 pts
38Sabine Parish22.9-0.5 pts
39West Carroll Parish22.8-0.2 pts
40St. Helena Parish22.6-0.3 pts
41Bienville Parish22.5-0.1 pts
42Caldwell Parish22.5-0.5 pts
43East Baton Rouge Parish22.4-0 pts
44Tensas Parish22.3-0.4 pts
45Morehouse Parish22.3-0.3 pts
46Cameron Parish22.2-0.7 pts
47Webster Parish22.1-0.4 pts
48Natchitoches Parish22-0.5 pts
49Catahoula Parish22+0.1 pts
50Pointe Coupee Parish21.9-0.2 pts
51Jackson Parish21.9-0.4 pts
52Jefferson Parish21.9-0 pts
53LaSalle Parish21.7-0.6 pts
54East Carroll Parish21.5-0.9 pts
55Union Parish21.3-0.4 pts
56Assumption Parish21.2-0.4 pts
57Grant Parish21.1-0.2 pts
58Winn Parish20.8-0.2 pts
59Iberville Parish20.7-0.3 pts
60Lincoln Parish20.4-0 pts
61Orleans Parish20.4-0.1 pts
62Claiborne Parish18.6-0.2 pts
63East Feliciana Parish17.4-0.6 pts
64West Feliciana Parish16.40 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, 2019) [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, 2019. 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=2019. 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, 2019. 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=2019.

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, 2019 [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=2019 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_louisiana_by_2019,
  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, 2019}},
  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=2019. 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, 2019
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=2019
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/louisiana-counties?period=2019.
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 27.5% in 2019, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

West Feliciana Parish, with 16.4% in 2019.

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