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Snohomish County, Washington Flood Zones

Check an Address in Snohomish County

Enter any address in Snohomish County, Washington to see its FEMA flood zone

Snohomish County Disaster History

Disaster Declarations
36
Flood/Coastal Disasters
13
Latest Disaster
SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES (2025-12-09)

Source: OpenFEMA Disaster Declarations Summaries.

Recent Disaster Declarations in Snohomish County

DeclarationTypeDate
SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDESFlood2025-12-09
SEVERE WINTER STORM, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDESSevere Storm2022-11-03
BOLT CREEK FIREFire2022-09-10
SEVERE WINTER STORM, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDESSevere Storm2020-12-29
SEVERE STORMS, FLOODING, LANDSLIDES, AND MUDSLIDESFlood2020-01-20
COVID-19Biological2020-01-20
COVID-19 PANDEMICBiological2020-01-20
SEVERE WINTER STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, MUDSLIDES, TORNADOSevere Storm2018-12-10
SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDESSevere Storm2015-11-12
SEVERE WINDSTORMSevere Storm2015-08-29

Flood Zone Types in Snohomish County

FEMA assigns flood zone designations to areas in Snohomish County, Washington:

AE High Risk — 1% annual chance of flooding. Insurance required.

VE Very High Risk — Coastal flooding with wave action.

X (Shaded) Moderate Risk — 500-year floodplain.

X Low Risk — Outside major floodplains.

View all flood zone types →

Flood Insurance in Snohomish County

Properties in Snohomish County, Washington that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.

Even outside high-risk zones, flood insurance is recommended. Over 20% of NFIP claims come from low and moderate-risk areas.

Visit FloodSmart.gov to find an agent and get a quote.