Illinois earthquake risk
102 counties scored 0 rated Very High
Cook County has the highest earthquake risk in Illinois, scoring 98.4 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Cook County | 98.4 | Relatively High |
| 2 | St. Clair County | 98 | Relatively Moderate |
| 3 | Madison County | 97.1 | Relatively Moderate |
| 4 | Jackson County | 96.7 | Relatively Moderate |
| 5 | Williamson County | 96.3 | Relatively Moderate |
| 6 | Jefferson County | 95.8 | Relatively Moderate |
| 7 | Randolph County | 95.5 | Relatively Moderate |
| 8 | Franklin County | 95.4 | Relatively Moderate |
| 9 | Marion County | 95 | Relatively Moderate |
| 10 | Sangamon County | 94.6 | Relatively Moderate |
| 11 | Perry County | 94.3 | Relatively Moderate |
| 12 | Macoupin County | 94.1 | Relatively Moderate |
| 13 | Saline County | 94.1 | Relatively Moderate |
| 14 | Massac County | 93.6 | Relatively Moderate |
| 15 | DuPage County | 93.2 | Relatively Moderate |
| 16 | White County | 91.9 | Relatively Moderate |
| 17 | Clinton County | 91.2 | Relatively Moderate |
| 18 | Pulaski County | 91.2 | Relatively Moderate |
| 19 | Johnson County | 91 | Relatively Moderate |
| 20 | Hamilton County | 90.7 | Relatively Moderate |
| 21 | Washington County | 90.5 | Relatively Moderate |
| 22 | Montgomery County | 90.4 | Relatively Moderate |
| 23 | Will County | 90.3 | Relatively Moderate |
| 24 | Alexander County | 90.2 | Relatively Moderate |
| 25 | Union County | 90.1 | Relatively Moderate |
| 26 | Macon County | 89.9 | Relatively Low |
| 27 | Richland County | 89.6 | Relatively Low |
| 28 | Champaign County | 89.5 | Relatively Low |
| 29 | Effingham County | 88.5 | Relatively Low |
| 30 | Coles County | 87.3 | Relatively Low |
| 31 | Christian County | 87.2 | Relatively Low |
| 32 | Bond County | 86.5 | Relatively Low |
| 33 | Kane County | 86.4 | Relatively Low |
| 34 | Wayne County | 86.4 | Relatively Low |
| 35 | Clay County | 86.3 | Relatively Low |
| 36 | Fayette County | 86.1 | Relatively Low |
| 37 | Wabash County | 86 | Relatively Low |
| 38 | Lake County | 85.7 | Relatively Low |
| 39 | Lawrence County | 85.5 | Relatively Low |
| 40 | Vermilion County | 85.2 | Relatively Low |
| 41 | Crawford County | 84.8 | Relatively Low |
| 42 | Gallatin County | 84.5 | Relatively Low |
| 43 | Monroe County | 84.5 | Relatively Low |
| 44 | Edwards County | 83.7 | Relatively Low |
| 45 | Edgar County | 82.6 | Relatively Low |
| 46 | LaSalle County | 82.4 | Relatively Low |
| 47 | McLean County | 82.3 | Relatively Low |
| 48 | Pope County | 82.1 | Relatively Low |
| 49 | Morgan County | 81.7 | Relatively Low |
| 50 | Clark County | 80.9 | Relatively Low |
| 51 | Kankakee County | 80.5 | Relatively Low |
| 52 | Winnebago County | 80 | Relatively Low |
| 53 | Peoria County | 79.9 | Relatively Low |
| 54 | Tazewell County | 79.7 | Relatively Low |
| 55 | Fulton County | 78.8 | Relatively Low |
| 56 | Shelby County | 78.7 | Relatively Low |
| 57 | Logan County | 76.8 | Relatively Low |
| 58 | Cumberland County | 76.5 | Relatively Low |
| 59 | Douglas County | 76.4 | Relatively Low |
| 60 | DeKalb County | 75.8 | Relatively Low |
| 61 | Jasper County | 75.6 | Relatively Low |
| 62 | Moultrie County | 75.2 | Relatively Low |
| 63 | McHenry County | 74.7 | Relatively Low |
| 64 | Bureau County | 74 | Relatively Low |
| 65 | Livingston County | 71.2 | Relatively Low |
| 66 | Iroquois County | 71.1 | Relatively Low |
| 67 | Hardin County | 69 | Relatively Low |
| 68 | Menard County | 68 | Relatively Low |
| 69 | Kendall County | 66.5 | Relatively Low |
| 70 | Piatt County | 66.4 | Relatively Low |
| 71 | De Witt County | 65.7 | Relatively Low |
| 72 | Adams County | 64.6 | Relatively Low |
| 73 | Jersey County | 64.3 | Relatively Low |
| 74 | Mason County | 63.8 | Relatively Low |
| 75 | Ogle County | 63.8 | Relatively Low |
| 76 | Whiteside County | 62.7 | Relatively Low |
| 77 | Rock Island County | 62.3 | Relatively Low |
| 78 | Ford County | 59.6 | Relatively Low |
| 79 | McDonough County | 59.6 | Relatively Low |
| 80 | Knox County | 58.4 | Very Low |
| 81 | Henry County | 58.1 | Very Low |
| 82 | Stephenson County | 57.7 | Very Low |
| 83 | Grundy County | 56.3 | Very Low |
| 84 | Greene County | 55.8 | Very Low |
| 85 | Marshall County | 54.5 | Very Low |
| 86 | Woodford County | 54.4 | Very Low |
| 87 | Lee County | 49.6 | Very Low |
| 88 | Pike County | 47.7 | Very Low |
| 89 | Cass County | 47.6 | Very Low |
| 90 | Boone County | 45.6 | Very Low |
| 91 | Hancock County | 40.6 | Very Low |
| 92 | Putnam County | 39.9 | Very Low |
| 93 | Schuyler County | 35.5 | Very Low |
| 94 | Warren County | 34.4 | Very Low |
| 95 | Calhoun County | 33.8 | Very Low |
| 96 | Carroll County | 31.6 | Very Low |
| 97 | Stark County | 30.4 | Very Low |
| 98 | Scott County | 28.8 | Very Low |
| 99 | Jo Daviess County | 28.1 | Very Low |
| 100 | Brown County | 28 | Very Low |
| 101 | Henderson County | 27.6 | Very Low |
| 102 | Mercer County | 24.7 | Very Low |
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.
Earthquake risk nationally:
Other hazard risks in Illinois:
Frequently asked questions
What is the highest earthquake risk county in Illinois?
Cook County, IL has the highest earthquake risk in Illinois, with a FEMA National Risk Index score of 98.4 out of 100 (rated "Relatively High").
What causes earthquake risk in Illinois?
Earthquake risk reflects expected annual losses from ground shaking. High scores concentrate in California, the Pacific Northwest, Alaska, and the New Madrid Seismic Zone (spanning Missouri, Arkansas, Tennessee, and neighboring states). NOAA's Storm Events Database does not track earthquakes, so recorded event counts are not shown.