Landslide Risk in South Dakota
All South Dakota counties ranked by FEMA National Risk Index landslide score
Landslide risk — downhill movement of rock, soil, and debris on unstable slopes — is rated for 66 of 66 South Dakota counties in FEMA's National Risk Index. Pennington County carries the state's highest landslide score at 84.8, with $30K in expected annual landslide losses.
No South Dakota county reaches the High band for landslide, and expected annual losses from landslide total roughly $66K statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Landslide
| # | County | Landslide Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Pennington County | Low | 1.73 / yr | $30K | |
| 2 | Yankton County | Low | 0.09 / yr | $4K | |
| 3 | Lawrence County | Low | 0.37 / yr | $4K | |
| 4 | Meade County | Very Low | 1.16 / yr | $4K | |
| 5 | Oglala Lakota County | Very Low | 1.55 / yr | $2K | |
| 6 | Fall River County | Very Low | 0.76 / yr | $2K | |
| 7 | Roberts County | Very Low | 0.16 / yr | $2K | |
| 8 | Minnehaha County | Very Low | 0.11 / yr | $2K | |
| 9 | Custer County | Very Low | 0.59 / yr | $2K | |
| 10 | Marshall County | Very Low | 0.15 / yr | $1K | |
| 11 | Brown County | Very Low | 0.16 / yr | $1K | |
| 12 | Day County | Very Low | 0.15 / yr | $599 | |
| 13 | Hanson County | Very Low | 0.05 / yr | $510 | |
| 14 | Hutchinson County | Very Low | 0.10 / yr | $659 | |
| 15 | Grant County | Very Low | 0.10 / yr | $771 | |
| 16 | Union County | Very Low | 0.08 / yr | $670 | |
| 17 | Bon Homme County | Very Low | 0.08 / yr | $685 | |
| 18 | Lincoln County | Very Low | 0.07 / yr | $810 | |
| 19 | Deuel County | Very Low | 0.09 / yr | $579 | |
| 20 | Butte County | Very Low | 0.48 / yr | $391 | |
| 21 | Clay County | Very Low | 0.05 / yr | $570 | |
| 22 | Dewey County | Very Low | 1.04 / yr | $201 | |
| 23 | Jackson County | Very Low | 0.81 / yr | $174 | |
| 24 | Jerauld County | Very Low | 0.07 / yr | $291 | |
| 25 | Stanley County | Very Low | 0.67 / yr | $422 | |
| 26 | Brookings County | Very Low | 0.09 / yr | $426 | |
| 27 | Todd County | Very Low | 0.41 / yr | $145 | |
| 28 | Lake County | Very Low | 0.06 / yr | $286 | |
| 29 | McCook County | Very Low | 0.07 / yr | $395 | |
| 30 | Haakon County | Very Low | 0.67 / yr | $229 | |
| 31 | Turner County | Very Low | 0.07 / yr | $317 | |
| 32 | Davison County | Very Low | 0.05 / yr | $257 | |
| 33 | Spink County | Very Low | 0.15 / yr | $317 | |
| 34 | Beadle County | Very Low | 0.13 / yr | $229 | |
| 35 | Codington County | Very Low | 0.08 / yr | $209 | |
| 36 | Moody County | Very Low | 0.06 / yr | $167 | |
| 37 | Ziebach County | Very Low | 0.74 / yr | $87 | |
| 38 | Mellette County | Very Low | 0.63 / yr | $97 | |
| 39 | Lyman County | Very Low | 0.51 / yr | $98 | |
| 40 | Corson County | Very Low | 0.70 / yr | $82 | |
| 41 | Gregory County | Very Low | 0.48 / yr | $153 | |
| 42 | Clark County | Very Low | 0.11 / yr | $183 | |
| 43 | Bennett County | Very Low | 0.40 / yr | $61 | |
| 44 | Harding County | Very Low | 0.72 / yr | $150 | |
| 45 | Hughes County | Very Low | 0.12 / yr | $166 | |
| 46 | Hamlin County | Very Low | 0.05 / yr | $147 | |
| 47 | Sanborn County | Very Low | 0.06 / yr | $129 | |
| 48 | Charles Mix County | Very Low | 0.19 / yr | $70 | |
| 49 | Perkins County | Very Low | 0.75 / yr | $100 | |
| 50 | Tripp County | Very Low | 0.35 / yr | $48 | |
| 51 | Aurora County | Very Low | 0.07 / yr | $64 | |
| 52 | Kingsbury County | Very Low | 0.08 / yr | $85 | |
| 53 | Brule County | Very Low | 0.11 / yr | $34 | |
| 54 | Jones County | Very Low | 0.40 / yr | $45 | |
| 55 | Miner County | Very Low | 0.06 / yr | $39 | |
| 56 | Douglas County | Very Low | 0.04 / yr | $25 | |
| 57 | Sully County | Very Low | 0.12 / yr | $21 | |
| 58 | Buffalo County | Very Low | 0.10 / yr | $7 | |
| 59 | Potter County | Very Low | 0.11 / yr | $7 | |
| 60 | Walworth County | Very Low | 0.11 / yr | $5 | |
| 61 | Hand County | Very Low | 0.16 / yr | $7 | |
| 62 | Campbell County | Very Low | 0.12 / yr | $7 | |
| 63 | Edmunds County | Very Low | 0.11 / yr | $6 | |
| 64 | McPherson County | Very Low | 0.13 / yr | $2 | |
| 65 | Faulk County | Very Low | 0.10 / yr | $2 | |
| 66 | Hyde County | Very Low | 0.10 / yr | $1 |
66 South Dakota counties with measurable landslide risk. See the national landslide ranking or all South Dakota counties by overall risk.
Frequently Asked Questions
Which South Dakota county has the highest landslide risk?
Pennington County has the highest FEMA landslide risk score in South Dakota at 84.8 (Low), with $30K in expected annual losses and about 1.73 events per year.
How many South Dakota counties face significant landslide risk?
66 South Dakota counties record measurable landslide risk in FEMA's National Risk Index; 0 of them are rated High or Very High.