Flood Risk by County in Idaho

Idaho: 44 counties covered

Across 44 Idaho counties with a FEMA flood score, the average national percentile is 43.2, but that average hides real spread between counties, which is why each one gets its own page rather than a single statewide number.

• Ada County, 89.8th percentile, Relatively Moderate
• Canyon County, 80.3th percentile, Relatively Moderate
• Kootenai County, 86.3th percentile, Relatively Moderate
• Bonneville County, 78.6th percentile, Relatively Moderate
• Twin Falls County, 51.1th percentile, Relatively Low
• Bannock County, 51.9th percentile, Relatively Low
• Madison County, 57.8th percentile, Relatively Low
• Bonner County, 87th percentile, Relatively Moderate
• Bingham County, 58.8th percentile, Relatively Low
• Nez Perce County, 57.7th percentile, Relatively Low
• Latah County, 50.4th percentile, Relatively Low
• Jefferson County, 37.1th percentile, Relatively Low
• Elmore County, 30.1th percentile, Very Low
• Payette County, 33.9th percentile, Very Low
• Jerome County, 31.1th percentile, Very Low
• Cassia County, 52.7th percentile, Relatively Low
• Blaine County, 70.5th percentile, Relatively Low
• Minidoka County, 32.1th percentile, Very Low
• Gem County, 35.7th percentile, Relatively Low
• Idaho County, 72.9th percentile, Relatively Low
• Gooding County, 25.9th percentile, Very Low
• Franklin County, 17.4th percentile, Very Low
• Fremont County, 41.4th percentile, Relatively Low
• Shoshone County, 76th percentile, Relatively Moderate
• Boundary County, 45.8th percentile, Relatively Low
• Teton County, 28th percentile, Very Low
• Valley County, 55.8th percentile, Relatively Low
• Owyhee County, 58.7th percentile, Relatively Low
• Washington County, 38.2th percentile, Relatively Low
• Benewah County, 46.9th percentile, Relatively Low
• Clearwater County, 55.7th percentile, Relatively Low
• Boise County, 42.9th percentile, Relatively Low
• Lemhi County, 59.8th percentile, Relatively Low
• Power County, 7.6th percentile, Very Low
• Caribou County, 10.7th percentile, Very Low
• Bear Lake County, 7.2th percentile, Very Low
• Lincoln County, 14.4th percentile, Very Low
• Adams County, 35.9th percentile, Relatively Low
• Oneida County, 4.9th percentile, Very Low
• Custer County, 57.3th percentile, Relatively Low
• Lewis County, 12th percentile, Very Low
• Butte County, 9.1th percentile, Very Low
• Camas County, 3.4th percentile, Very Low
• Clark County, 2.1th percentile, Very Low