# Counties in Louisiana by median age on 1 July (US county estimates), 2025

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

- Indicator id: `median_age_pep`
- Unit: years
- Definition: Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/median-age-july-1-us-counties/louisiana-counties

| Rank | Place | years |
|---:|---|---:|
| 1 | Tensas Parish | 49 |
| 2 | East Feliciana Parish | 46.1 |
| 3 | West Feliciana Parish | 45.8 |
| 4 | Union Parish | 45.3 |
| 5 | Claiborne Parish | 45.2 |
| 6 | Assumption Parish | 45 |
| 7 | West Carroll Parish | 44.5 |
| 8 | Pointe Coupee Parish | 44.3 |
| 9 | Bienville Parish | 43.8 |
| 9 | St. Helena Parish | 43.8 |
| 11 | Sabine Parish | 43.6 |
| 12 | Webster Parish | 43.5 |
| 13 | Morehouse Parish | 43.3 |
| 14 | St. James Parish | 42.6 |
| 15 | Cameron Parish | 42.2 |
| 15 | Catahoula Parish | 42.2 |
| 17 | St. Tammany Parish | 41.8 |
| 18 | Jackson Parish | 41.6 |
| 18 | Washington Parish | 41.6 |
| 20 | Iberville Parish | 41.3 |
| 21 | De Soto Parish | 41.2 |
| 21 | St. Martin Parish | 41.2 |
| 23 | Franklin Parish | 41 |
| 23 | St. Mary Parish | 41 |
| 25 | Avoyelles Parish | 40.9 |
| 26 | Red River Parish | 40.8 |
| 27 | Caddo Parish | 40.6 |
| 27 | St. Charles Parish | 40.6 |
| 29 | Jefferson Parish | 40.5 |
| 29 | St. John the Baptist Parish | 40.5 |
| 31 | Caldwell Parish | 40.4 |
| 31 | Richland Parish | 40.4 |
| 33 | Iberia Parish | 40.3 |
| 34 | Madison Parish | 40 |
| 35 | Concordia Parish | 39.9 |
| 35 | Lafourche Parish | 39.9 |
| 37 | Allen Parish | 39.8 |
| 38 | Grant Parish | 39.5 |
| 39 | Jefferson Davis Parish | 39.4 |
| 39 | Rapides Parish | 39.4 |
| 39 | Terrebonne Parish | 39.4 |
| 39 | Vermilion Parish | 39.4 |
| 43 | St. Landry Parish | 39.3 |
| 44 | Orleans Parish | 39.2 |
| 45 | Acadia Parish | 38.7 |
| 45 | Beauregard Parish | 38.7 |
| 45 | Plaquemines Parish | 38.7 |
| 48 | Calcasieu Parish | 38.5 |
| 48 | Evangeline Parish | 38.5 |
| 48 | West Baton Rouge Parish | 38.5 |
| 51 | Winn Parish | 38.2 |
| 52 | Ascension Parish | 37.7 |
| 53 | Ouachita Parish | 37.4 |
| 54 | Bossier Parish | 37.2 |
| 55 | Lafayette Parish | 37.1 |
| 56 | East Carroll Parish | 37 |
| 57 | Natchitoches Parish | 36.9 |
| 58 | Livingston Parish | 36.7 |
| 58 | Tangipahoa Parish | 36.7 |
| 60 | St. Bernard Parish | 36.6 |
| 61 | LaSalle Parish | 36.5 |
| 62 | East Baton Rouge Parish | 35.6 |
| 63 | Vernon Parish | 33.9 |
| 64 | Lincoln Parish | 28.7 |