Florida coastal flooding risk
Miami-Dade County has the highest coastal flooding risk in Florida, scoring 99.6 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Miami-Dade County | 99.6 | Very High |
| 2 | Pinellas County | 99.2 | Very High |
| 3 | Monroe County | 98.8 | Very High |
| 4 | Manatee County | 98 | Very High |
| 5 | Lee County | 97.4 | Very High |
| 6 | Broward County | 97 | Very High |
| 7 | Collier County | 95.2 | Very High |
| 8 | Sarasota County | 93.6 | Relatively High |
| 9 | Palm Beach County | 93.4 | Relatively High |
| 10 | Citrus County | 92.6 | Relatively High |
| 11 | Hillsborough County | 92.4 | Relatively High |
| 12 | Duval County | 91 | Relatively High |
| 13 | Pasco County | 90.8 | Relatively High |
| 14 | Charlotte County | 90.4 | Relatively High |
| 15 | St. Johns County | 89 | Relatively High |
| 16 | Volusia County | 85 | Relatively High |
| 17 | Brevard County | 82 | Relatively Moderate |
| 18 | Franklin County | 77.4 | Relatively Moderate |
| 19 | Bay County | 77.2 | Relatively Moderate |
| 20 | Escambia County | 76.8 | Relatively Moderate |
| 21 | Taylor County | 76.6 | Relatively Moderate |
| 22 | Nassau County | 75.8 | Relatively Moderate |
| 23 | Hernando County | 74.2 | Relatively Moderate |
| 24 | Dixie County | 73.6 | Relatively Moderate |
| 25 | Martin County | 73 | Relatively Moderate |
| 26 | Levy County | 72.6 | Relatively Moderate |
| 27 | Santa Rosa County | 70.8 | Relatively Moderate |
| 28 | Indian River County | 69 | Relatively Moderate |
| 29 | Flagler County | 67.6 | Relatively Moderate |
| 30 | St. Lucie County | 65.2 | Relatively Moderate |
| 31 | Okaloosa County | 62.6 | Relatively Moderate |
| 32 | Walton County | 62.2 | Relatively Moderate |
| 33 | Gulf County | 61.6 | Relatively Moderate |
| 34 | Wakulla County | 61.2 | Relatively Moderate |
| 35 | Putnam County | 60.4 | Relatively Low |
| 36 | Clay County | 57 | Relatively Low |
| 37 | Jefferson County | 39.4 | Very Low |
| 38 | Lake County | 35.4 | Very Low |
| 39 | DeSoto County | 33.4 | Very Low |
| 40 | Liberty County | 28.6 | Very Low |
| 41 | Gilchrist County | 25.8 | Very Low |
| 42 | Hendry County | 25.6 | Very Low |
| 43 | Marion County | 24.6 | Very Low |
| 44 | Leon County | 23.4 | Very Low |
| 45 | Washington County | 22.4 | Very Low |
| 46 | Lafayette County | 22 | Very Low |
| 47 | Calhoun County | 21.2 | Very Low |
| 48 | Alachua County | 0 | No Rating |
| 49 | Baker County | 0 | No Rating |
| 50 | Bradford County | 0 | No Rating |
| 51 | Columbia County | 0 | No Rating |
| 52 | Glades County | 0 | No Rating |
| 53 | Hardee County | 0 | No Rating |
| 54 | Holmes County | 0 | No Rating |
| 55 | Okeechobee County | 0 | No Rating |
| 56 | Orange County | 0 | No Rating |
| 57 | Seminole County | 0 | No Rating |
| 58 | Suwannee County | 0 | No Rating |
| 59 | Union County | 0 | No Rating |
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.
Coastal Flooding risk nationally:
Other hazard risks in Florida:
Frequently asked questions
What is the highest coastal flooding risk county in Florida?
Miami-Dade County, FL has the highest coastal flooding risk in Florida, with a FEMA National Risk Index score of 99.6 out of 100 (rated "Very High").
How many counties in Florida are rated Very High for coastal flooding risk?
7 of 59 scored Florida counties are rated "Very High" for coastal flooding risk by FEMA's National Risk Index.
What causes coastal flooding risk in Florida?
Coastal flooding scores cover storm surge, wave action, and tidal flooding along the Gulf, Atlantic, and Pacific coasts, and Great Lakes shoreline. Inland flooding is scored separately. Counties with "Not Applicable" ratings have no significant coastal exposure. Coastal flood events are reported at zone level in NOAA Storm Events and are not included in county-level counts.