Illinois Power Outage History
102 counties tracked, 2014–2025. County-level reliability grades and outage frequency below.
Counties tracked
102
Avg national percentile
63rd
Higher = more reliable
Grade F counties
3
County rankings (worst to best)
| County | Grade | National percentile |
|---|---|---|
| Mercer County | F | 11th |
| Stark County | F | 13th |
| Henderson County | F | 19th |
| Marshall County | D | 22nd |
| Putnam County | D | 26th |
| Edgar County | D | 29th |
| Washington County | D | 31st |
| De Witt County | D | 32nd |
| Gallatin County | D | 35th |
| Warren County | D | 35th |
| Monroe County | D | 38th |
| Rock Island County | C | 41st |
| Clark County | C | 42nd |
| Perry County | C | 44th |
| Carroll County | C | 45th |
| Pope County | C | 45th |
| Fayette County | C | 46th |
| Vermilion County | C | 46th |
| Lee County | C | 46th |
| Shelby County | C | 46th |
| Jefferson County | C | 47th |
| Douglas County | C | 48th |
| Christian County | C | 48th |
| LaSalle County | C | 49th |
| Calhoun County | C | 49th |
| Logan County | C | 50th |
| Jo Daviess County | C | 50th |
| Knox County | C | 50th |
| Bureau County | C | 50th |
| Saline County | C | 51st |
| Piatt County | C | 52nd |
| Bond County | C | 52nd |
| Hardin County | C | 53rd |
| Johnson County | C | 53rd |
| Hancock County | C | 54th |
| Jasper County | C | 54th |
| Stephenson County | C | 57th |
| St. Clair County | C | 58th |
| Marion County | C | 59th |
| Lawrence County | C | 60th |
| Woodford County | C | 60th |
| Alexander County | B | 60th |
| Whiteside County | B | 60th |
| Crawford County | B | 60th |
| Randolph County | B | 61st |
| Winnebago County | B | 61st |
| Franklin County | B | 62nd |
| Adams County | B | 62nd |
| Scott County | B | 63rd |
| Brown County | B | 63rd |
| Will County | B | 63rd |
| Morgan County | B | 64th |
| Macon County | B | 64th |
| Livingston County | B | 65th |
| Madison County | B | 65th |
| Cumberland County | B | 65th |
| Kankakee County | B | 66th |
| McHenry County | B | 67th |
| Pike County | B | 67th |
| Clinton County | B | 68th |
| Peoria County | B | 68th |
| Sangamon County | B | 68th |
| Tazewell County | B | 69th |
| Ogle County | B | 70th |
| Iroquois County | B | 71st |
| Fulton County | B | 71st |
| Williamson County | B | 72nd |
| Boone County | B | 73rd |
| Ford County | B | 73rd |
| Jackson County | B | 74th |
| Pulaski County | B | 75th |
| Mason County | B | 75th |
| Macoupin County | B | 75th |
| Union County | B | 76th |
| McDonough County | B | 76th |
| Moultrie County | B | 77th |
| Grundy County | B | 77th |
| Hamilton County | B | 77th |
| Henry County | B | 78th |
| Champaign County | B | 79th |
| Cook County | B | 79th |
| Kane County | B | 79th |
| Montgomery County | A | 80th |
| DuPage County | A | 80th |
| McLean County | A | 81st |
| Greene County | A | 81st |
| Menard County | A | 82nd |
| Jersey County | A | 84th |
| Coles County | A | 84th |
| Richland County | A | 87th |
| Wayne County | A | 88th |
| White County | A | 88th |
| DeKalb County | A | 89th |
| Effingham County | A | 89th |
| Schuyler County | A | 91st |
| Edwards County | A | 91st |
| Clay County | A | 91st |
| Lake County | A | 92nd |
| Cass County | A | 92nd |
| Kendall County | A | 93rd |
| Massac County | A | 94th |
| Wabash County | A | 97th |