Louisiana earthquake risk
Ouachita Parish has the highest earthquake risk in Louisiana, scoring 89.3 out of 100 — rated "Relatively Low" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Ouachita Parish | 89.3 | Relatively Low |
| 2 | Caddo Parish | 84.7 | Relatively Low |
| 3 | East Baton Rouge Parish | 84.4 | Relatively Low |
| 4 | Orleans Parish | 80.4 | Relatively Low |
| 5 | Jefferson Parish | 78 | Relatively Low |
| 6 | Morehouse Parish | 74.5 | Relatively Low |
| 7 | Rapides Parish | 73.7 | Relatively Low |
| 8 | Bossier Parish | 72 | Relatively Low |
| 9 | Webster Parish | 69.6 | Relatively Low |
| 10 | Lafayette Parish | 68.4 | Relatively Low |
| 11 | Lincoln Parish | 68.2 | Relatively Low |
| 12 | St. Tammany Parish | 67.3 | Relatively Low |
| 13 | Calcasieu Parish | 65.5 | Relatively Low |
| 14 | Tangipahoa Parish | 65.3 | Relatively Low |
| 15 | Richland Parish | 61.6 | Relatively Low |
| 16 | St. Landry Parish | 58.9 | Very Low |
| 17 | East Carroll Parish | 58.5 | Very Low |
| 18 | Ascension Parish | 58.4 | Very Low |
| 19 | Livingston Parish | 57.5 | Very Low |
| 20 | Natchitoches Parish | 57.1 | Very Low |
| 21 | West Carroll Parish | 55.9 | Very Low |
| 22 | Lafourche Parish | 55.4 | Very Low |
| 23 | Terrebonne Parish | 54.8 | Very Low |
| 24 | Washington Parish | 54.7 | Very Low |
| 25 | Franklin Parish | 54.1 | Very Low |
| 26 | Union Parish | 52.7 | Very Low |
| 27 | Avoyelles Parish | 52.1 | Very Low |
| 28 | Madison Parish | 49.8 | Very Low |
| 29 | Concordia Parish | 49.7 | Very Low |
| 30 | Claiborne Parish | 48.8 | Very Low |
| 31 | Acadia Parish | 48.3 | Very Low |
| 32 | Jackson Parish | 48.2 | Very Low |
| 33 | Iberia Parish | 46.5 | Very Low |
| 34 | St. Martin Parish | 43.8 | Very Low |
| 35 | St. Mary Parish | 43.7 | Very Low |
| 36 | Bienville Parish | 42.3 | Very Low |
| 37 | De Soto Parish | 42.3 | Very Low |
| 38 | Winn Parish | 41.1 | Very Low |
| 39 | Vernon Parish | 40.5 | Very Low |
| 40 | Evangeline Parish | 40.3 | Very Low |
| 41 | Catahoula Parish | 39.9 | Very Low |
| 42 | Pointe Coupee Parish | 39.3 | Very Low |
| 43 | East Feliciana Parish | 38.3 | Very Low |
| 44 | St. John the Baptist Parish | 37.3 | Very Low |
| 45 | Sabine Parish | 37.1 | Very Low |
| 46 | Tensas Parish | 37 | Very Low |
| 47 | Grant Parish | 36.6 | Very Low |
| 48 | LaSalle Parish | 35.9 | Very Low |
| 49 | St. Charles Parish | 35 | Very Low |
| 50 | Iberville Parish | 34.7 | Very Low |
| 51 | Red River Parish | 34.4 | Very Low |
| 52 | Beauregard Parish | 34.1 | Very Low |
| 53 | Vermilion Parish | 34.1 | Very Low |
| 54 | St. Bernard Parish | 33.4 | Very Low |
| 55 | Jefferson Davis Parish | 31.3 | Very Low |
| 56 | West Baton Rouge Parish | 31.1 | Very Low |
| 57 | St. James Parish | 30.2 | Very Low |
| 58 | Assumption Parish | 30 | Very Low |
| 59 | Allen Parish | 29.7 | Very Low |
| 60 | Plaquemines Parish | 29.5 | Very Low |
| 61 | St. Helena Parish | 28.4 | Very Low |
| 62 | Caldwell Parish | 28.3 | Very Low |
| 63 | West Feliciana Parish | 25 | Very Low |
| 64 | Cameron Parish | 10.4 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Earthquake risk nationally:
Other hazard risks in Louisiana:
Frequently asked questions
What is the highest earthquake risk county in Louisiana?
Ouachita Parish, LA has the highest earthquake risk in Louisiana, with a FEMA National Risk Index score of 89.3 out of 100 (rated "Relatively Low").
What causes earthquake risk in Louisiana?
Earthquake risk reflects expected annual losses from ground shaking. High scores concentrate in California, the Pacific Northwest, Alaska, and the New Madrid Seismic Zone (spanning Missouri, Arkansas, Tennessee, and neighboring states). NOAA's Storm Events Database does not track earthquakes, so recorded event counts are not shown.