Illinois landslide risk
102 counties scored 0 rated Very High
Jackson County has the highest landslide risk in Illinois, scoring 94.8 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Jackson County | 94.8 | Relatively Moderate | 0 |
| 2 | Peoria County | 94.8 | Relatively Moderate | 0 |
| 3 | Jo Daviess County | 92 | Relatively Moderate | 0 |
| 4 | Calhoun County | 86.4 | Relatively Low | 0 |
| 5 | Madison County | 85.6 | Relatively Low | 0 |
| 6 | Randolph County | 85.1 | Relatively Low | 0 |
| 7 | St. Clair County | 84.3 | Relatively Low | 0 |
| 8 | Rock Island County | 84 | Relatively Low | 0 |
| 9 | Pike County | 82 | Relatively Low | 0 |
| 10 | Jersey County | 81.8 | Relatively Low | 0 |
| 11 | Monroe County | 81.6 | Relatively Low | 0 |
| 12 | Fulton County | 80.9 | Relatively Low | 0 |
| 13 | Schuyler County | 79.4 | Relatively Low | 0 |
| 14 | Williamson County | 79.3 | Relatively Low | 0 |
| 15 | Macoupin County | 79 | Relatively Low | 0 |
| 16 | Brown County | 78.6 | Relatively Low | 0 |
| 17 | Adams County | 78.1 | Relatively Low | 0 |
| 18 | Carroll County | 76.9 | Relatively Low | 0 |
| 19 | Clark County | 76.7 | Relatively Low | 0 |
| 20 | Greene County | 75.5 | Relatively Low | 0 |
| 21 | Tazewell County | 75.3 | Relatively Low | 0 |
| 22 | Fayette County | 73.1 | Relatively Low | 0 |
| 23 | Saline County | 72.4 | Relatively Low | 0 |
| 24 | Hancock County | 71.6 | Relatively Low | 0 |
| 25 | Knox County | 70.8 | Relatively Low | 0 |
| 26 | Effingham County | 70.7 | Relatively Low | 0 |
| 27 | Montgomery County | 70.5 | Relatively Low | 0 |
| 28 | Jefferson County | 70.1 | Relatively Low | 0 |
| 29 | LaSalle County | 69 | Relatively Low | 0 |
| 30 | Mercer County | 68.1 | Relatively Low | 0 |
| 31 | Bond County | 67.4 | Relatively Low | 0 |
| 32 | Marion County | 67 | Relatively Low | 0 |
| 33 | Woodford County | 66.9 | Relatively Low | 0 |
| 34 | Coles County | 66.6 | Relatively Low | 0 |
| 35 | Bureau County | 66.4 | Relatively Low | 0 |
| 36 | Menard County | 65.8 | Relatively Low | 0 |
| 37 | Perry County | 65.6 | Relatively Low | 0 |
| 38 | White County | 64.6 | Relatively Low | 0 |
| 39 | Marshall County | 64.5 | Relatively Low | 0 |
| 40 | Henry County | 64.4 | Relatively Low | 0 |
| 41 | Morgan County | 64.2 | Relatively Low | 0 |
| 42 | Shelby County | 63.5 | Relatively Low | 0 |
| 43 | Sangamon County | 63.1 | Relatively Low | 0 |
| 44 | Vermilion County | 62.6 | Relatively Low | 0 |
| 45 | McDonough County | 61.5 | Very Low | 0 |
| 46 | Washington County | 61.1 | Very Low | 0 |
| 47 | Cumberland County | 60.6 | Very Low | 0 |
| 48 | Will County | 59.4 | Very Low | 0 |
| 49 | Whiteside County | 58.8 | Very Low | 0 |
| 50 | Scott County | 57.9 | Very Low | 0 |
| 51 | McHenry County | 57.2 | Very Low | 0 |
| 52 | Henderson County | 56.6 | Very Low | 0 |
| 53 | Cook County | 56.4 | Very Low | 0 |
| 54 | Clay County | 55.9 | Very Low | 0 |
| 55 | Alexander County | 55.6 | Very Low | 0 |
| 56 | Wayne County | 55.5 | Very Low | 0 |
| 57 | Cass County | 55.4 | Very Low | 0 |
| 58 | Jasper County | 54.9 | Very Low | 0 |
| 59 | Union County | 54 | Very Low | 0 |
| 60 | Richland County | 53.6 | Very Low | 0 |
| 61 | Macon County | 52.3 | Very Low | 0 |
| 62 | Stephenson County | 52.3 | Very Low | 0 |
| 63 | Ogle County | 51.3 | Very Low | 0 |
| 64 | Kane County | 51.1 | Very Low | 0 |
| 65 | Winnebago County | 50.7 | Very Low | 0 |
| 66 | Franklin County | 50.3 | Very Low | 0 |
| 67 | Warren County | 49.8 | Very Low | 0 |
| 68 | McLean County | 49.2 | Very Low | 0 |
| 69 | Hamilton County | 49 | Very Low | 0 |
| 70 | Crawford County | 48.9 | Very Low | 0 |
| 71 | Putnam County | 47.4 | Very Low | 0 |
| 72 | Christian County | 47.1 | Very Low | 0 |
| 73 | Lake County | 46.7 | Very Low | 0 |
| 74 | Edwards County | 46.5 | Very Low | 0 |
| 75 | Edgar County | 46.2 | Very Low | 0 |
| 76 | De Witt County | 45.6 | Very Low | 0 |
| 77 | Lawrence County | 45.2 | Very Low | 0 |
| 78 | Clinton County | 45 | Very Low | 0 |
| 79 | Champaign County | 44.3 | Very Low | 0 |
| 80 | Johnson County | 44 | Very Low | 0 |
| 81 | Wabash County | 42.6 | Very Low | 0 |
| 82 | Massac County | 42.3 | Very Low | 0 |
| 83 | Moultrie County | 41 | Very Low | 0 |
| 84 | Iroquois County | 38.5 | Very Low | 0 |
| 85 | Lee County | 37.5 | Very Low | 0 |
| 86 | Mason County | 36.9 | Very Low | 0 |
| 87 | Kendall County | 36.2 | Very Low | 0 |
| 88 | Pulaski County | 36.1 | Very Low | 0 |
| 89 | Kankakee County | 35.1 | Very Low | 0 |
| 90 | Livingston County | 34.5 | Very Low | 0 |
| 91 | Grundy County | 33.9 | Very Low | 0 |
| 92 | Logan County | 33.3 | Very Low | 0 |
| 93 | Piatt County | 33.1 | Very Low | 0 |
| 94 | DuPage County | 33 | Very Low | 0 |
| 95 | Pope County | 33 | Very Low | 0 |
| 96 | Hardin County | 32 | Very Low | 0 |
| 97 | DeKalb County | 28.7 | Very Low | 0 |
| 98 | Stark County | 28.3 | Very Low | 0 |
| 99 | Boone County | 28.1 | Very Low | 0 |
| 100 | Douglas County | 26.6 | Very Low | 0 |
| 101 | Ford County | 16.3 | Very Low | 0 |
| 102 | Gallatin County | 14.3 | Very Low | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Landslide risk nationally:
Other hazard risks in Illinois:
Frequently asked questions
What is the highest landslide risk county in Illinois?
Jackson County, IL has the highest landslide risk in Illinois, with a FEMA National Risk Index score of 94.8 out of 100 (rated "Relatively Moderate").
What causes landslide risk in Illinois?
Landslide risk covers expected losses from hillslope failures, rockfalls, and debris flows triggered by heavy rainfall, snowmelt, wildfire, or earthquakes. High scores concentrate in the Pacific Northwest, California coastal ranges, Appalachians, and Rocky Mountain foothills, where steep terrain combines with intense precipitation or seismic activity.