Riskiest Counties for Landslide

Ranked by FEMA National Risk Index landslide hazard score · code LNDS

Landslide risk reflects downhill movement of rock, soil, and debris on unstable slopes. FEMA's National Risk Index scores each county's landslide hazard from its expected annual loss, annualized event frequency, and exposed population. Santa Barbara County, California currently leads the nation with a landslide score of 100.0 and $51M in expected annual loss. California, Washington, Alaska account for much of the highest-rated landslide risk in this dataset.

Read the full landslide risk guide — how FEMA scores it and how to prepare →

County Rankings

#CountyStateLandslide ScoreRatingAnn. Freq.Ann. Loss
1Santa Barbara CountyCA
100.0
Very High 60.37 / yr$51M
2Snohomish CountyWA
100.0
Very High 4.12 / yr$25M
3San Bernardino CountyCA
99.9
Very High 27.53 / yr$18M
4Monterey CountyCA
99.9
High 129.63 / yr$5M
5Island CountyWA
99.9
High 0.40 / yr$6M
6Alameda CountyCA
99.8
High 24.63 / yr$6M
7Sonoma CountyCA
99.8
High 67.44 / yr$5M
8Macon CountyNC
99.8
High 1.92 / yr$3M
9Orange CountyCA
99.7
High 17.84 / yr$4M
10Santa Clara CountyCA
99.7
High 64.63 / yr$5M
11San Mateo CountyCA
99.7
High 3.94 / yr$4M
12Petersburg BoroughAK
99.7
High 5.74 / yr$3M
13Honolulu CountyHI
99.6
High 0.32 / yr$4M
14Humboldt CountyCA
99.6
High 83.33 / yr$2M
15Mendocino CountyCA
99.6
High 94.88 / yr$2M
16San Diego CountyCA
99.5
High 177.45 / yr$3M
17Mariposa CountyCA
99.5
High 27.38 / yr$2M
18Hawkins CountyTN
99.5
High 1.47 / yr$2M
19San Luis Obispo CountyCA
99.4
High 128.71 / yr$2M
20Fairbanks North Star BoroughAK
99.4
High 11.13 / yr$3M
21Mesa CountyCO
99.4
High 2.96 / yr$2M
22Los Angeles CountyCA
99.3
High 78.63 / yr$2M
23Contra Costa CountyCA
99.3
High 19.83 / yr$2M
24Santa Cruz CountyCA
99.3
High 6.50 / yr$2M
25Marin CountyCA
99.2
High 12.05 / yr$2M

Showing the top 25 seeded counties for landslide risk.

Landslide Risk by State

DelawareNew JerseyCaliforniaConnecticutArizonaMassachusettsFloridaHawaiiSouth CarolinaWashingtonNew HampshireNew YorkPennsylvaniaNorth CarolinaOregonLouisianaAlabamaMarylandWisconsinNew MexicoMaineRhode IslandOklahomaArkansasOhioIllinoisTennesseeMississippiMissouriMichiganWest VirginiaTexasNevadaIndianaKentuckyMinnesotaColoradoIowaGeorgiaIdahoWyomingVermontUtahAlaskaVirginiaMontanaKansasSouth DakotaNebraskaNorth Dakota