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 2017, at 27.6%. West Feliciana Parish had the lowest, at 16.3%. The median was 23.9% and the figure for Louisiana was 23.7%. Source: the U.S. Census Bureau.

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Highest27.6Ascension Parish
Lowest16.3West Feliciana Parish
Median23.964 counties
Louisiana23.7History

Map of counties, 2017

Acadia Parish: 26 %Allen Parish: 22.9 %Ascension Parish: 27.6 %Assumption Parish: 22 %Avoyelles Parish: 23.4 %Beauregard Parish: 24.6 %Bienville Parish: 22.9 %Bossier Parish: 25.6 %Caddo Parish: 24.1 %Calcasieu Parish: 24.8 %Caldwell Parish: 23.1 %Cameron Parish: 22.7 %Catahoula Parish: 22.4 %Claiborne Parish: 19 %Concordia Parish: 24.5 %De Soto Parish: 24.3 %East Baton Rouge Parish: 22.6 %East Carroll Parish: 23 %East Feliciana Parish: 18.2 %Evangeline Parish: 25.1 %Franklin Parish: 25 %Grant Parish: 21 %Iberia Parish: 25.5 %Iberville Parish: 21.3 %Jackson Parish: 22.2 %Jefferson Parish: 21.9 %Jefferson Davis Parish: 25.6 %Lafayette Parish: 24 %Lafourche Parish: 23.8 %LaSalle Parish: 22.3 %Lincoln Parish: 20.6 %Livingston Parish: 26.4 %Madison Parish: 25.4 %Morehouse Parish: 22.9 %Natchitoches Parish: 22.9 %Orleans Parish: 20.5 %Ouachita Parish: 25.5 %Plaquemines Parish: 26.3 %Pointe Coupee Parish: 22.6 %Rapides Parish: 24.5 %Red River Parish: 24.5 %Richland Parish: 23.6 %Sabine Parish: 23.6 %St. Bernard Parish: 27.6 %St. Charles Parish: 25 %St. Helena Parish: 22.7 %St. James Parish: 23.6 %St. John the Baptist Parish: 24.3 %St. Landry Parish: 26.1 %St. Martin Parish: 24.8 %St. Mary Parish: 24.3 %St. Tammany Parish: 24.1 %Tangipahoa Parish: 24.3 %Tensas Parish: 24 %Terrebonne Parish: 25.3 %Union Parish: 22 %Vermilion Parish: 25.8 %Vernon Parish: 26 %Washington Parish: 23.8 %Webster Parish: 22.7 %West Baton Rouge Parish: 24.7 %West Carroll Parish: 23.2 %West Feliciana Parish: 16.3 %Winn Parish: 21.2 %
  • Under 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2017. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Ascension Parish: 27.6 %Ascension Parish27.6St. Bernard Parish: 27.6 %St. Bernard Parish27.6Livingston Parish: 26.4 %Livingston Parish26.4Plaquemines Parish: 26.3 %Plaquemines Parish26.3St. Landry Parish: 26.1 %St. Landry Parish26.1Acadia Parish: 26 %Acadia Parish26Vernon Parish: 26 %Vernon Parish26Vermilion Parish: 25.8 %Vermilion Parish25.8Bossier Parish: 25.6 %Bossier Parish25.6Jefferson Davis Parish: 25.6 %Jefferson Davis Parish25.6Iberia Parish: 25.5 %Iberia Parish25.5Ouachita Parish: 25.5 %Ouachita Parish25.5Madison Parish: 25.4 %Madison Parish25.4Terrebonne Parish: 25.3 %Terrebonne Parish25.3Evangeline Parish: 25.1 %Evangeline Parish25.1Franklin Parish: 25 %Franklin Parish25St. Charles Parish: 25 %St. Charles Parish25Calcasieu Parish: 24.8 %Calcasieu Parish24.8St. Martin Parish: 24.8 %St. Martin Parish24.8West Baton Rouge Parish: 24.7 %West Baton Rouge Parish24.7Beauregard Parish: 24.6 %Beauregard Parish24.6Rapides Parish: 24.5 %Rapides Parish24.5Red River Parish: 24.5 %Red River Parish24.5Concordia Parish: 24.5 %Concordia Parish24.5St. John the Baptist Parish: 24.3 %St. John the Baptist Parish24.3St. Mary Parish: 24.3 %St. Mary Parish24.3Tangipahoa Parish: 24.3 %Tangipahoa Parish24.3De Soto Parish: 24.3 %De Soto Parish24.3St. Tammany Parish: 24.1 %St. Tammany Parish24.1Caddo Parish: 24.1 %Caddo Parish24.1Tensas Parish: 24 %Tensas Parish24Lafayette Parish: 24 %Lafayette Parish24Washington Parish: 23.8 %Washington Parish23.8Lafourche Parish: 23.8 %Lafourche Parish23.8Sabine Parish: 23.6 %Sabine Parish23.6Richland Parish: 23.6 %Richland Parish23.6St. James Parish: 23.6 %St. James Parish23.6Avoyelles Parish: 23.4 %Avoyelles Parish23.4West Carroll Parish: 23.2 %West Carroll Parish23.2Caldwell Parish: 23.1 %Caldwell Parish23.1Ascension Parish: 27.6 %Ascension Parish27.6St. Bernard Parish: 27.6 %St. Bernard Parish27.6Livingston Parish: 26.4 %Livingston Parish26.4Plaquemines Parish: 26.3 %Plaquemines Parish26.3St. Landry Parish: 26.1 %St. Landry Parish26.1Acadia Parish: 26 %Acadia Parish26Vernon Parish: 26 %Vernon Parish26Vermilion Parish: 25.8 %Vermilion Parish25.8Bossier Parish: 25.6 %Bossier Parish25.6Jefferson Davis Parish: 25.6 %Jefferson Davis Parish25.6Iberia Parish: 25.5 %Iberia Parish25.5Ouachita Parish: 25.5 %Ouachita Parish25.5Madison Parish: 25.4 %Madison Parish25.4Terrebonne Parish: 25.3 %Terrebonne Parish25.3Evangeline Parish: 25.1 %Evangeline Parish25.1Franklin Parish: 25 %Franklin Parish25St. Charles Parish: 25 %St. Charles Parish25Calcasieu Parish: 24.8 %Calcasieu Parish24.8St. Martin Parish: 24.8 %St. Martin Parish24.8West Baton Rouge Parish: 24.7 %West Baton Rouge Parish24.7Beauregard Parish: 24.6 %Beauregard Parish24.6Rapides Parish: 24.5 %Rapides Parish24.5Red River Parish: 24.5 %Red River Parish24.5Concordia Parish: 24.5 %Concordia Parish24.5St. John the Baptist Parish: 24.3 %St. John the Baptist Parish24.3St. Mary Parish: 24.3 %St. Mary Parish24.3Tangipahoa Parish: 24.3 %Tangipahoa Parish24.3De Soto Parish: 24.3 %De Soto Parish24.3St. Tammany Parish: 24.1 %St. Tammany Parish24.1Caddo Parish: 24.1 %Caddo Parish24.1Tensas Parish: 24 %Tensas Parish24Lafayette Parish: 24 %Lafayette Parish24Washington Parish: 23.8 %Washington Parish23.8Lafourche Parish: 23.8 %Lafourche Parish23.8Sabine Parish: 23.6 %Sabine Parish23.6Richland Parish: 23.6 %Richland Parish23.6St. James Parish: 23.6 %St. James Parish23.6Avoyelles Parish: 23.4 %Avoyelles Parish23.4West Carroll Parish: 23.2 %West Carroll Parish23.2Caldwell Parish: 23.1 %Caldwell Parish23.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Ascension Parish27.6-0.2 pts
2St. Bernard Parish27.6-0.2 pts
3Livingston Parish26.4-0.2 pts
4Plaquemines Parish26.3-0.3 pts
5St. Landry Parish26.1-0.2 pts
6Acadia Parish26-0.3 pts
7Vernon Parish26-0.2 pts
8Vermilion Parish25.8-0.3 pts
9Bossier Parish25.6-0.1 pts
10Jefferson Davis Parish25.6+0.2 pts
11Iberia Parish25.5-0.4 pts
12Ouachita Parish25.5-0.3 pts
13Madison Parish25.4-0.2 pts
14Terrebonne Parish25.3-0.3 pts
15Evangeline Parish25.1-0.4 pts
16Franklin Parish25-0.1 pts
17St. Charles Parish25-0.2 pts
18Calcasieu Parish24.80 pts
19St. Martin Parish24.8-0 pts
20West Baton Rouge Parish24.70 pts
21Beauregard Parish24.6-0 pts
22Rapides Parish24.5-0.2 pts
23Red River Parish24.5-0.1 pts
24Concordia Parish24.5+0.1 pts
25St. John the Baptist Parish24.3-0.1 pts
26St. Mary Parish24.3-0.3 pts
27Tangipahoa Parish24.3-0.1 pts
28De Soto Parish24.30 pts
29St. Tammany Parish24.1-0.1 pts
30Caddo Parish24.1-0.1 pts
31Tensas Parish24+0.3 pts
32Lafayette Parish24-0 pts
33Washington Parish23.80 pts
34Lafourche Parish23.8-0.1 pts
35Sabine Parish23.6-0.3 pts
36Richland Parish23.6-0.4 pts
37St. James Parish23.6-0.2 pts
38Avoyelles Parish23.4-0.1 pts
39West Carroll Parish23.2-0.2 pts
40Caldwell Parish23.1+0.2 pts
41East Carroll Parish23-0.4 pts
42Natchitoches Parish22.9-0.2 pts
43Bienville Parish22.9-0.1 pts
44Morehouse Parish22.90 pts
45Allen Parish22.9-0.2 pts
46St. Helena Parish22.7-0.2 pts
47Webster Parish22.7-0 pts
48Cameron Parish22.70 pts
49Pointe Coupee Parish22.6-0.1 pts
50East Baton Rouge Parish22.6-0.1 pts
51Catahoula Parish22.4-0.1 pts
52LaSalle Parish22.3-0.3 pts
53Jackson Parish22.2+0.1 pts
54Union Parish22-0.1 pts
55Assumption Parish22-0.2 pts
56Jefferson Parish21.9-0 pts
57Iberville Parish21.3-0.1 pts
58Winn Parish21.2-0.3 pts
59Grant Parish21-0.3 pts
60Lincoln Parish20.6+0.1 pts
61Orleans Parish20.5-0 pts
62Claiborne Parish19-0.2 pts
63East Feliciana Parish18.2-0.5 pts
64West Feliciana Parish16.3-0.1 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, 2017) [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, 2017. 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=2017. 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, 2017. 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=2017.

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, 2017 [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=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_louisiana_by_2017,
  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, 2017}},
  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=2017. 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, 2017
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=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/louisiana-counties?period=2017.
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 27.6% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

West Feliciana Parish, with 16.3% in 2017.

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