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Updated April 2026

Flood Risk in California

California has 59 counties with flood risk data, 361 total NFIP flood insurance claims, and an average risk score of 13 out of 100.

59
Counties
361
NFIP Claims
$10,258,852
Total Payouts
13
Avg Risk Score

Grade Distribution

A
56
counties
B
3
counties
C
0
counties
D
0
counties
F
0
counties

Riskiest in California

CountyGradeScore
Santa BarbaraB23
MarinB21
Santa CruzB21
AlamedaA20
Los AngelesA18

Safest in California

CountyGradeScore
San MateoA10
OrangeA10
San FranciscoA10
AlpineA11
AmadorA11

All 59 Counties in California

Sorted by flood risk score, highest to lowest.

#CountyGradeScoreClaimsPayoutsDisasters
1Santa BarbaraB2323$1,064,56315
2MarinB2115$244,12411
3Santa CruzB2122$715,81210
4AlamedaA208$47,7269
5Los AngelesA1836$796,93812
6SonomaA1755$1,599,26611
7San BernardinoA165$162,44215
8HumboldtA151$014
9San JoaquinA157$139,29913
10MendocinoA150$013
11RiversideA157$43,90816
12San Luis ObispoA148$298,74812
13San DiegoA1435$974,41914
14Contra CostaA131$011
15Del NorteA130$010
16GlennA132$21,40510
17MontereyA138$631,57310
18NapaA133$33,09210
19SacramentoA1316$168,10412
20SolanoA134$32,60210
21TehamaA131$54,78911
22TrinityA130$011
23KernA136$10,81010
24VenturaA139$138,68812
25Tule River Indian ReservationA120$09
26ButteA126$68,5248
27ColusaA120$08
28El DoradoA125$112,8929
29KingsA120$09
30LakeA125$112,7418
31ModocA120$08
32MonoA120$08
33PlumasA120$08
34San BenitoA127$810,4188
35Santa ClaraA1217$501,2158
36ShastaA121$09
37SiskiyouA120$08
38StanislausA120$08
39SutterA122$08
40TuolumneA120$08
41YoloA122$160,7458
42YubaA123$27,0669
43InyoA120$09
44PlacerA121$08
45TulareA123$127,8859
46AlpineA111$07
47AmadorA110$07
48CalaverasA110$06
49LassenA112$138,6976
50MariposaA110$07
51MercedA117$495,5307
52NevadaA112$1,0386
53SierraA111$24,8357
54FresnoA111$11,0577
55ImperialA110$06
56MaderaA111$07
57San MateoA1011$347,3429
58OrangeA1010$140,55913
59San FranciscoA101$04