South Dakota: 66 counties covered
Across 66 South Dakota counties with a FEMA flood score, the average national percentile is 25.6 — but that average hides real spread between counties, which is why each one gets its own page rather than a single statewide number.
- Minnehaha County — 85.5th percentile, Relatively Moderate
- Pennington County — 75.6th percentile, Relatively Moderate
- Lincoln County — 56.6th percentile, Relatively Low
- Brown County — 63.1th percentile, Relatively Low
- Brookings County — 48.4th percentile, Relatively Low
- Meade County — 51.9th percentile, Relatively Low
- Codington County — 65.2th percentile, Relatively Low
- Lawrence County — 57.1th percentile, Relatively Low
- Yankton County — 57.3th percentile, Relatively Low
- Davison County — 35.9th percentile, Relatively Low
- Beadle County — 45.6th percentile, Relatively Low
- Hughes County — 32.6th percentile, Very Low
- Union County — 47.5th percentile, Relatively Low
- Clay County — 28.7th percentile, Very Low
- Oglala Lakota County — 19th percentile, Very Low
- Lake County — 34.1th percentile, Very Low
- Butte County — 33.4th percentile, Very Low
- Roberts County — 38th percentile, Relatively Low
- Charles Mix County — 40.5th percentile, Relatively Low
- Custer County — 19.3th percentile, Very Low
- Todd County — 28.3th percentile, Very Low
- Turner County — 26.7th percentile, Very Low
- Grant County — 17.3th percentile, Very Low
- Hutchinson County — 35.2th percentile, Relatively Low
- Fall River County — 41.5th percentile, Relatively Low
- Bon Homme County — 8.9th percentile, Very Low
- Hamlin County — 16th percentile, Very Low
- Moody County — 26.1th percentile, Very Low
- Spink County — 25.3th percentile, Very Low
- McCook County — 58.4th percentile, Relatively Low
- Tripp County — 37.1th percentile, Relatively Low
- Day County — 20th percentile, Very Low
- Dewey County — 17.4th percentile, Very Low
- Walworth County — 34.8th percentile, Very Low
- Brule County — 28.6th percentile, Very Low
- Kingsbury County — 9.4th percentile, Very Low
- Marshall County — 10.4th percentile, Very Low
- Deuel County — 9.3th percentile, Very Low
- Gregory County — 15.4th percentile, Very Low
- Edmunds County — 8th percentile, Very Low
- Clark County — 5.4th percentile, Very Low
- Corson County — 16.1th percentile, Very Low
- Lyman County — 29.1th percentile, Very Low
- Hanson County — 15th percentile, Very Low
- Bennett County — 4.3th percentile, Very Low
- Hand County — 6.2th percentile, Very Low
- Stanley County — 20th percentile, Very Low
- Douglas County — 10.5th percentile, Very Low
- Perkins County — 4.7th percentile, Very Low
- Aurora County — 13th percentile, Very Low
- Jackson County — 13.6th percentile, Very Low
- Ziebach County — 8.9th percentile, Very Low
- Potter County — 14.6th percentile, Very Low
- Sanborn County — 6.2th percentile, Very Low
- McPherson County — 8th percentile, Very Low
- Miner County — 4.2th percentile, Very Low
- Faulk County — 6.8th percentile, Very Low
- Haakon County — 22th percentile, Very Low
- Mellette County — 8.1th percentile, Very Low
- Buffalo County — 10.8th percentile, Very Low
- Jerauld County — 8.4th percentile, Very Low
- Sully County — 14.1th percentile, Very Low
- Campbell County — 8.7th percentile, Very Low
- Harding County — 3.5th percentile, Very Low
- Hyde County — 11.5th percentile, Very Low
- Jones County — 4.9th percentile, Very Low