Georgia coastal flooding risk
Chatham County has the highest coastal flooding risk in Georgia, scoring 96 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Chatham County | 96 | Very High |
| 2 | Glynn County | 89.6 | Relatively High |
| 3 | Camden County | 71.6 | Relatively Moderate |
| 4 | McIntosh County | 70.2 | Relatively Moderate |
| 5 | Bryan County | 63.8 | Relatively Moderate |
| 6 | Liberty County | 51.2 | Relatively Low |
| 7 | Effingham County | 24.8 | Very Low |
| 8 | Brantley County | 20.2 | Very Low |
| 9 | Long County | 20 | Very Low |
| 10 | Wayne County | 19.8 | Very Low |
| 11 | Charlton County | 18.4 | Very Low |
| 12 | Screven 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 Georgia:
Frequently asked questions
What is the highest coastal flooding risk county in Georgia?
Chatham County, GA has the highest coastal flooding risk in Georgia, with a FEMA National Risk Index score of 96 out of 100 (rated "Very High").
How many counties in Georgia are rated Very High for coastal flooding risk?
1 of 12 scored Georgia counties are rated "Very High" for coastal flooding risk by FEMA's National Risk Index.
What causes coastal flooding risk in Georgia?
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.