US Counties With the Highest Coastal Flood Risk

These counties carry the highest coastal flooding risk in the country according to FEMA's National Risk Index, exposed to storm surge, tidal flooding, and wave action during major coastal storms. Sea-level rise is gradually increasing these risks.

#	County	State	Coastal flood risk	Overall
1	Miami-Dade County	Florida	10.0	7.4
2	Queens County	New York	10.0	7.8
3	Broward County	Florida	10.0	6.8
4	Suffolk County	New York	10.0	7.9
5	Nassau County	New York	10.0	7.6
6	Pinellas County	Florida	10.0	6.7
7	Bergen County	New Jersey	10.0	7.5
8	Essex County	Massachusetts	10.0	7.6
9	Lee County	Florida	10.0	6.4
10	Ocean County	New Jersey	10.0	8.0
11	Charleston County	South Carolina	10.0	7.7
12	Manatee County	Florida	10.0	6.7
13	Marin County	California	10.0	5.6
14	Sussex County	Delaware	10.0	7.9
15	Cape May County	New Jersey	10.0	6.6
16	Monroe County	Florida	10.0	4.6
17	Grays Harbor County	Washington	10.0	5.4
18	Accomack County	Virginia	10.0	5.4
19	Los Angeles County	California	9.9	7.6
20	Orange County	California	9.9	6.7
21	Palm Beach County	Florida	9.9	7.2
22	Hillsborough County	Florida	9.9	7.5
23	Duval County	Florida	9.9	7.2
24	Suffolk County	Massachusetts	9.9	6.8
25	San Mateo County	California	9.9	5.9
26	Hudson County	New Jersey	9.9	7.3
27	Monmouth County	New Jersey	9.9	7.8
28	Western Connecticut County	Connecticut	9.9	7.8
29	South Central Connecticut County	Connecticut	9.9	7.4
30	Pasco County	Florida	9.9	6.3
31	Plymouth County	Massachusetts	9.9	6.9
32	Jefferson County	Louisiana	9.9	7.5
33	Sarasota County	Florida	9.9	6.2
34	Mobile County	Alabama	9.9	8.3
35	Collier County	Florida	9.9	6.6
36	Greater Bridgeport County	Connecticut	9.9	6.5
37	Rockingham County	New Hampshire	9.9	7.3
38	Chatham County	Georgia	9.9	7.6
39	Atlantic County	New Jersey	9.9	7.7
40	Barnstable County	Massachusetts	9.9	6.2
41	Harrison County	Mississippi	9.9	7.8
42	Charlotte County	Florida	9.9	5.9
43	Beaufort County	South Carolina	9.9	7.6
44	Citrus County	Florida	9.9	5.9
45	Brunswick County	North Carolina	9.9	7.3
46	Skagit County	Washington	9.9	6.4
47	Terrebonne County	Louisiana	9.9	6.6
48	Glynn County	Georgia	9.9	6.3
49	Salem County	New Jersey	9.9	6.7
50	St. Charles County	Louisiana	9.9	5.6

Source: FEMA National Risk Index. Scores normalized 1–10. City scores inherit county-level FEMA data. For informational purposes only.

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