Kitsap County Disaster Risk
Kitsap County, Washington
FEMA Risk Rating
Relatively Moderate
National Percentile
92th
of 3,144 counties
State Rank
#8
of 39 (1 = highest risk)
Flood Risk
79th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively Low
Higher than 79% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Very Low
Higher than 40% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 24% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively High
Higher than 99% of US counties
Risk Overview
About Natural Disaster Risk in Kitsap County, Washington
Kitsap County carries relatively moderate risk
Kitsap County's composite risk score of 92.30 places it in the "Relatively Moderate" category, above the national average but lower than many high-hazard regions. The county's risk is concentrated in earthquake exposure and coastal flooding, not evenly distributed across all disaster types.
Above average risk for Washington state
Kitsap County scores 92.30 against Washington's state average of 70.01, ranking it in the upper tier of county risk statewide. The gap reflects significant seismic hazard from the Cascadia Subduction Zone and fault systems affecting this Puget Sound peninsula.
Kitsap sits between risk extremes
Kitsap County's score of 92.30 exceeds Mason County (85.34) to the south but falls short of King County's extreme 99.68 to the east. This places Kitsap as a moderate-to-high risk zone within the greater Puget Sound region.
Earthquakes and flooding threaten Kitsap
Kitsap County faces severe earthquake risk (98.66) from the Cascadia Subduction Zone and local faults, plus notable flood exposure (79.40) along Puget Sound and river valleys. Wildfire risk (39.85) is relatively low compared to eastern Washington, and tornadoes (23.66) are uncommon.
Earthquake and flood coverage essential
Kitsap County residents should prioritize earthquake and flood insurance, as standard policies exclude both hazards. Waterfront and riverside homeowners face particular flooding risk, while all structures in Kitsap need seismic readiness—securing water heaters, bracing foundations, and maintaining earthquake insurance.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Kitsap County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Kitsap County
Risk Verdict
FEMA's National Risk Index rates Kitsap County at the 92th percentile nationally — above average and worth proactive preparation. Residents should prioritize a formal household emergency plan, including evacuation routes, insurance review, and a well-stocked emergency kit.
Hazard Breakdown
Earthquake risk is Kitsap County's dominant natural hazard, ranked at the 99th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 79th percentile nationally. Additional tracked hazards include wildfire (40th percentile), tornado (24th percentile).
Preparedness Context
Earthquake exposure at the 99th percentile nationally puts Kitsap County in a zone where utilities — gas, water, electrical — are the most common post-quake hazard. Knowing how to shut off the main gas valve is an important household skill to develop before an event occurs. The county's flood risk at the 79th percentile nationally is a seasonal consideration alongside the year-round earthquake threat, requiring awareness of both hazard types. Kitsap County households benefit from keeping shoes and a flashlight near the bed — post-earthquake navigation through debris in the dark is a common cause of secondary injury. This low-cost step has outsized protective value.
Regional Context
Kitsap County is 22.3 composite risk points above the Washington average, indicating that residents face greater natural hazard exposure than most of their in-state neighbors.
Is your household prepared for Kitsap County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Kitsap County, WA?
What types of natural hazards affect Kitsap County?
How does Kitsap County risk compare to the Washington average?
Is Kitsap County at risk for earthquake?
How is natural disaster risk measured?
Why is Kitsap County higher risk than average?
Data Source
Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.
Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.