Landslide Risk in California

All California counties ranked by FEMA National Risk Index landslide score

Landslide risk — downhill movement of rock, soil, and debris on unstable slopes — is rated for 58 of 58 California counties in FEMA's National Risk Index. Santa Barbara County carries the state's highest landslide score at 100.0, with $51M in expected annual landslide losses.

29 California counties are rated High or Very High for landslide, and expected annual losses from landslide total roughly $130M statewide. The full ranking below links to each county's complete 18-hazard risk profile.

County Rankings — Landslide

#CountyLandslide ScoreRatingAnn. Freq.Ann. Loss
1 Santa Barbara County
100.0
Very High 60.37 / yr $51M
2 San Bernardino County
99.9
Very High 27.53 / yr $18M
3 Monterey County
99.9
High 129.63 / yr $5M
4 Alameda County
99.8
High 24.63 / yr $6M
5 Sonoma County
99.8
High 67.44 / yr $5M
6 Orange County
99.7
High 17.84 / yr $4M
7 Santa Clara County
99.7
High 64.63 / yr $5M
8 San Mateo County
99.7
High 3.94 / yr $4M
9 Humboldt County
99.6
High 83.33 / yr $2M
10 Mendocino County
99.6
High 94.88 / yr $2M
11 San Diego County
99.5
High 177.45 / yr $3M
12 Mariposa County
99.5
High 27.38 / yr $2M
13 San Luis Obispo County
99.4
High 128.71 / yr $2M
14 Los Angeles County
99.3
High 78.63 / yr $2M
15 Contra Costa County
99.3
High 19.83 / yr $2M
16 Santa Cruz County
99.3
High 6.50 / yr $2M
17 Marin County
99.2
High 12.05 / yr $2M
18 Lake County
98.8
High 93.97 / yr $872K
19 Riverside County
98.7
High 21.78 / yr $1M
20 Napa County
98.7
High 41.62 / yr $1M
21 Trinity County
98.7
High 18.46 / yr $730K
22 Del Norte County
98.6
High 2.18 / yr $847K
23 Kern County
98.5
High 128.61 / yr $758K
24 San Francisco County
98.4
High 0.22 / yr $829K
25 Solano County
98.4
High 8.50 / yr $894K
26 Tehama County
98.3
High 78.86 / yr $625K
27 Fresno County
98.1
High 90.07 / yr $519K
28 Ventura County
98.0
High 64.12 / yr $651K
29 Tulare County
97.9
High 70.09 / yr $433K
30 Madera County
97.8
Medium 28.58 / yr $353K
31 San Benito County
97.7
Medium 91.77 / yr $687K
32 Butte County
97.6
Medium 20.96 / yr $388K
33 El Dorado County
97.0
Medium 3.11 / yr $336K
34 Calaveras County
96.6
Medium 15.00 / yr $200K
35 Nevada County
95.5
Medium 2.27 / yr $148K
36 Sierra County
94.6
Medium 3.01 / yr $97K
37 Amador County
94.3
Medium 7.45 / yr $104K
38 Shasta County
92.4
Medium 6.43 / yr $78K
39 Tuolumne County
91.2
Medium 4.42 / yr $59K
40 Siskiyou County
91.1
Medium 7.55 / yr $47K
41 Yuba County
89.1
Medium 5.58 / yr $55K
42 Plumas County
88.9
Medium 6.93 / yr $34K
43 Stanislaus County
86.7
Low 18.22 / yr $39K
44 Glenn County
86.7
Low 24.48 / yr $47K
45 Yolo County
86.2
Low 10.51 / yr $40K
46 Placer County
85.5
Low 2.28 / yr $40K
47 Inyo County
82.7
Low 30.58 / yr $16K
48 Sacramento County
79.4
Low 4.11 / yr $15K
49 Mono County
74.9
Low 14.18 / yr $10K
50 Colusa County
70.6
Low 16.73 / yr $6K
51 Alpine County
66.5
Low 2.09 / yr $4K
52 San Joaquin County
62.0
Very Low 7.42 / yr $3K
53 Kings County
57.7
Very Low 8.57 / yr $2K
54 Merced County
54.7
Very Low 14.94 / yr $2K
55 Lassen County
51.0
Very Low 2.52 / yr $1K
56 Sutter County
47.2
Very Low 3.05 / yr $997
57 Imperial County
41.2
Very Low 6.46 / yr $459
58 Modoc County
33.3
Very Low 0.86 / yr $314

58 California counties with measurable landslide risk. See the national landslide ranking or all California counties by overall risk.

Frequently Asked Questions

Which California county has the highest landslide risk?

Santa Barbara County has the highest FEMA landslide risk score in California at 100.0 (Very High), with $51M in expected annual losses and about 60.37 events per year.

How many California counties face significant landslide risk?

58 California counties record measurable landslide risk in FEMA's National Risk Index; 29 of them are rated High or Very High.

Other Hazards in California