# Counties in Louisiana by population aged 18 to 64, 2025

All 64 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_18_64_share`
- Unit: %
- Definition: 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.
- Source: 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: 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.
- Web page: https://invokely.ai/rankings/population-18-64/louisiana-counties

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