Counties in Louisiana by population aged 18 to 64, 2025

Winn Parish had the highest population aged 18 to 64 of 64 counties in 2025, at 66.6%. Tensas Parish had the lowest, at 50.8%. The median was 57% and the figure for Louisiana was 58.5%. Source: the U.S. Census Bureau.

Highest66.6Winn Parish

Lowest50.8Tensas Parish

Median5764 counties

Louisiana58.5History

Top 40 counties, 2025

%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2025 (%)	Change on 2024
1	Winn Parish	66.6	+0.9 pts
2	East Carroll Parish	64.9	0 pts
3	Lincoln Parish	64.9	0 pts
4	West Feliciana Parish	64.3	-0.6 pts
5	Orleans Parish	62.4	-0.3 pts
6	Grant Parish	62.3	+0.1 pts
7	Allen Parish	61	0 pts
8	LaSalle Parish	60.7	-0.1 pts
9	East Baton Rouge Parish	60.7	-0.2 pts
10	Plaquemines Parish	60.4	+0.1 pts
11	Jackson Parish	60.3	+0.3 pts
12	Livingston Parish	59.8	-0 pts
13	Ascension Parish	59.8	-0 pts
14	West Baton Rouge Parish	59.7	-0 pts
15	St. Bernard Parish	59.7	+0.1 pts
16	Lafayette Parish	59.3	-0.2 pts
17	Iberville Parish	59.1	-0.3 pts
18	Natchitoches Parish	59	-0.2 pts
19	Vernon Parish	59	-0.5 pts
20	Tangipahoa Parish	59	0 pts
21	Lafourche Parish	58.8	-0.3 pts
22	Ouachita Parish	58.7	-0.1 pts
23	Bossier Parish	58.6	-0.1 pts
24	East Feliciana Parish	58.6	-0.9 pts
25	Terrebonne Parish	58.2	-0.3 pts
26	St. John the Baptist Parish	58.1	-0.1 pts
27	St. Charles Parish	58.1	-0.4 pts
28	Calcasieu Parish	58	-0.2 pts
29	Caldwell Parish	57.9	0 pts
30	Jefferson Parish	57.7	-0.3 pts
31	Assumption Parish	57.6	-0.6 pts
32	St. Helena Parish	57	-0.6 pts
33	Concordia Parish	56.9	-0 pts
34	Evangeline Parish	56.9	+0.1 pts
35	Avoyelles Parish	56.6	-0.2 pts
36	St. Tammany Parish	56.6	-0.2 pts
37	Claiborne Parish	56.5	-0.8 pts
38	Caddo Parish	56.4	-0.3 pts
39	Beauregard Parish	56.4	-0.2 pts
40	Vermilion Parish	56.4	-0.1 pts
41	Rapides Parish	56.3	-0.4 pts
42	Iberia Parish	56.3	-0.5 pts
43	Richland Parish	56.3	-0.3 pts
44	Madison Parish	56.1	+0.1 pts
45	Jefferson Davis Parish	56	-0.1 pts
46	St. Martin Parish	55.9	-0.5 pts
47	Catahoula Parish	55.9	-0.3 pts
48	Cameron Parish	55.8	-0.7 pts
49	St. James Parish	55.7	-0.4 pts
50	Washington Parish	55.6	+0.1 pts
51	De Soto Parish	55.5	-0.5 pts
52	St. Mary Parish	55.5	-0.4 pts
53	Franklin Parish	55.4	-0.2 pts
54	Acadia Parish	54.9	-0.4 pts
55	Webster Parish	54.8	-0.4 pts
56	Morehouse Parish	54.7	-0.6 pts
57	Union Parish	54.7	-0.4 pts
58	St. Landry Parish	54.6	-0.2 pts
59	Pointe Coupee Parish	54.5	-0.1 pts
60	Red River Parish	54.4	-0.4 pts
61	Bienville Parish	54.3	-0.1 pts
62	West Carroll Parish	53.2	-0.3 pts
63	Sabine Parish	53	-0.4 pts
64	Tensas Parish	50.8	-0.6 pts

Other periods

About this ranking

Residents aged 18 to 64 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.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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 18 to 64 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 18 to 64 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 aged 18 to 64, 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 18 to 64 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 aged 18 to 64, 2025. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/louisiana-counties. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 aged 18 to 64, 2025. 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-18-64/louisiana-counties.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 aged 18 to 64, 2025 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/louisiana-counties (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_louisiana_by_2025,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 aged 18 to 64, 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/rankings/population-18-64/louisiana-counties. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 18 to 64 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 aged 18 to 64, 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/rankings/population-18-64/louisiana-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/louisiana-counties.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 aged 18 to 64?

Winn Parish, with 66.6% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Tensas Parish, with 50.8% in 2025.

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 18 to 64 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.