| # | County | Risk Index score |
|---|---|---|
| 1 | Jefferson Parish | 98.7 |
| 2 | Orleans Parish | 98.3 |
| 3 | East Baton Rouge Parish | 98.0 |
| 4 | St. Tammany Parish | 96.6 |
| 5 | Calcasieu Parish | 95.7 |
| 6 | Lafayette Parish | 95.2 |
| 7 | Livingston Parish | 94.5 |
| 8 | Terrebonne Parish | 94.2 |
| 9 | Tangipahoa Parish | 93.3 |
| 10 | Caddo Parish | 92.6 |
| 11 | Ascension Parish | 92.1 |
| 12 | Lafourche Parish | 91.3 |
| 13 | Iberia Parish | 90.6 |
| 14 | St. Mary Parish | 88.9 |
| 15 | Acadia Parish | 88.6 |
| 16 | St. Landry Parish | 88.2 |
| 17 | Ouachita Parish | 87.5 |
| 18 | St. Martin Parish | 87.3 |
| 19 | Washington Parish | 85.5 |
| 20 | St. Charles Parish | 85.1 |
| 21 | Vermilion Parish | 84.8 |
| 22 | Rapides Parish | 84.3 |
| 23 | Bossier Parish | 82.5 |
| 24 | St. John the Baptist Parish | 81.5 |
| 25 | Evangeline Parish | 75.9 |
Source: FEMA National Risk Index (December 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Natural Hazard Risk in Louisiana”, https://gismap.land/rankings/louisiana/highest-risk-counties. Figures from FEMA National Risk Index (December 2025).
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