Flood Risk by County in Montana

Montana: 56 counties covered

Across 56 Montana counties with a FEMA flood score, the average national percentile is 31.9, but that average hides real spread between counties, which is why each one gets its own page rather than a single statewide number.

• Yellowstone County, 84.5th percentile, Relatively Moderate
• Gallatin County, 64.2th percentile, Relatively Low
• Missoula County, 68.6th percentile, Relatively Low
• Flathead County, 79.8th percentile, Relatively Moderate
• Cascade County, 83.4th percentile, Relatively Moderate
• Lewis and Clark County, 64.6th percentile, Relatively Low
• Ravalli County, 52th percentile, Relatively Low
• Silver Bow County, 21.7th percentile, Very Low
• Lake County, 57.2th percentile, Relatively Low
• Lincoln County, 65.5th percentile, Relatively Low
• Park County, 55.6th percentile, Relatively Low
• Hill County, 43.4th percentile, Relatively Low
• Sanders County, 61.9th percentile, Relatively Low
• Glacier County, 45.5th percentile, Relatively Low
• Jefferson County, 29.4th percentile, Very Low
• Big Horn County, 55.1th percentile, Relatively Low
• Custer County, 38.3th percentile, Relatively Low
• Fergus County, 36.5th percentile, Relatively Low
• Carbon County, 72.3th percentile, Relatively Low
• Richland County, 25.1th percentile, Very Low
• Roosevelt County, 26.6th percentile, Very Low
• Beaverhead County, 36.3th percentile, Relatively Low
• Deer Lodge County, 10.5th percentile, Very Low
• Madison County, 29.8th percentile, Very Low
• Stillwater County, 36.2th percentile, Relatively Low
• Dawson County, 28.1th percentile, Very Low
• Broadwater County, 19.1th percentile, Very Low
• Rosebud County, 56.5th percentile, Relatively Low
• Valley County, 34.2th percentile, Very Low
• Powell County, 15.8th percentile, Very Low
• Blaine County, 46.5th percentile, Relatively Low
• Teton County, 32.2th percentile, Very Low
• Pondera County, 29.3th percentile, Very Low
• Chouteau County, 50.4th percentile, Relatively Low
• Musselshell County, 15.5th percentile, Very Low
• Mineral County, 16th percentile, Very Low
• Toole County, 17.8th percentile, Very Low
• Phillips County, 39.8th percentile, Relatively Low
• Sweet Grass County, 19.7th percentile, Very Low
• Granite County, 11.1th percentile, Very Low
• Sheridan County, 13.3th percentile, Very Low
• Fallon County, 5.5th percentile, Very Low
• Judith Basin County, 12.6th percentile, Very Low
• Meagher County, 9.7th percentile, Very Low
• Wheatland County, 12.2th percentile, Very Low
• Liberty County, 11.9th percentile, Very Low
• Powder River County, 7.8th percentile, Very Low
• McCone County, 5.6th percentile, Very Low
• Daniels County, 3th percentile, Very Low
• Carter County, 4.1th percentile, Very Low
• Garfield County, 5.4th percentile, Very Low
• Prairie County, 5.8th percentile, Very Low
• Wibaux County, 3.7th percentile, Very Low
• Golden Valley County, 5.6th percentile, Very Low
• Treasure County, 2.5th percentile, Very Low
• Petroleum County, 2th percentile, Very Low