Counties with the Highest Natural Hazard Risk in South Dakota
The top 25 of 66 South Dakota counties on GIS Map, ranked by FEMA National Risk Index score (0-100, national percentile).
| # | County | Risk Index score |
|---|---|---|
| 1 | Minnehaha County | 89.5 |
| 2 | Dewey County | 78.7 |
| 3 | Pennington County | 78.6 |
| 4 | Brown County | 73.5 |
| 5 | Yankton County | 63.4 |
| 6 | Lincoln County | 63.0 |
| 7 | Codington County | 61.8 |
| 8 | Brule County | 58.7 |
| 9 | Brookings County | 50.1 |
| 10 | Oglala Lakota County | 49.8 |
| 11 | Meade County | 49.5 |
| 12 | Lawrence County | 49.3 |
| 13 | Charles Mix County | 48.5 |
| 14 | Hutchinson County | 47.9 |
| 15 | Beadle County | 47.1 |
| 16 | McCook County | 43.4 |
| 17 | Walworth County | 39.5 |
| 18 | Davison County | 39.2 |
| 19 | Corson County | 38.1 |
| 20 | Roberts County | 37.8 |
| 21 | Union County | 37.1 |
| 22 | Todd County | 36.6 |
| 23 | Tripp County | 36.5 |
| 24 | Lake County | 32.6 |
| 25 | Fall River County | 30.9 |
Source: FEMA National Risk Index (December 2025). All counties with data are ranked. Estimates carry margins of error.
Citing this page: GIS Map, “Counties with the Highest Natural Hazard Risk in South Dakota”, https://gismap.land/rankings/south-dakota/highest-risk-counties. Figures from FEMA National Risk Index (December 2025).
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