Flood Risk by County in Washington

Washington: 39 counties covered

Across 39 Washington counties with a FEMA flood score, the average national percentile is 73.3, but that average hides real spread between counties, which is why each one gets its own page rather than a single statewide number.

• King County, 99.5th percentile, Very High
• Pierce County, 96.2th percentile, Relatively High
• Snohomish County, 95.7th percentile, Relatively High
• Spokane County, 91.6th percentile, Relatively Moderate
• Clark County, 92.6th percentile, Relatively Moderate
• Thurston County, 90.8th percentile, Relatively Moderate
• Kitsap County, 79.4th percentile, Relatively Moderate
• Yakima County, 92.9th percentile, Relatively Moderate
• Whatcom County, 88.9th percentile, Relatively Moderate
• Benton County, 89.7th percentile, Relatively Moderate
• Skagit County, 91.4th percentile, Relatively High
• Cowlitz County, 88.3th percentile, Relatively Moderate
• Grant County, 77.2th percentile, Relatively Moderate
• Franklin County, 83.5th percentile, Relatively Moderate
• Lewis County, 90.9th percentile, Relatively Moderate
• Island County, 73.4th percentile, Relatively Moderate
• Chelan County, 91.3th percentile, Relatively Moderate
• Clallam County, 75th percentile, Relatively Moderate
• Grays Harbor County, 99th percentile, Very High
• Mason County, 79.3th percentile, Relatively Moderate
• Walla Walla County, 64.8th percentile, Relatively Low
• Stevens County, 68.6th percentile, Relatively Low
• Whitman County, 58.8th percentile, Relatively Low
• Kittitas County, 74.8th percentile, Relatively Moderate
• Douglas County, 82.1th percentile, Relatively Moderate
• Okanogan County, 89.1th percentile, Relatively Moderate
• Jefferson County, 64.4th percentile, Relatively Moderate
• Pacific County, 75th percentile, Relatively Moderate
• Klickitat County, 66.6th percentile, Relatively Low
• Asotin County, 38.5th percentile, Relatively Low
• Adams County, 34.3th percentile, Very Low
• San Juan County, 58.4th percentile, Relatively Low
• Pend Oreille County, 54.3th percentile, Relatively Low
• Skamania County, 49.8th percentile, Relatively Low
• Lincoln County, 50th percentile, Relatively Low
• Ferry County, 52.3th percentile, Relatively Low
• Wahkiakum County, 70.4th percentile, Relatively Moderate
• Columbia County, 30.7th percentile, Very Low
• Garfield County, 10.3th percentile, Very Low