Outage Almanac

Illinois power outages

102 counties with outage records. Pick one to see its history.

Illinois averaged 0.42 times the US outage time per person

That ranks 38 of 50 states and DC, where 1 has the most. August and June made up 47% of outage time. Records run from 2015 to 2023, and some counties start later.

Stark County had the most outage time per resident of 95 rated counties.

Counties ranked by outage time

RankCountyMajor outages per yearLongest (hours)Times US rate
1Stark County0.9512.67
2Henderson County0.8302.13
3Edgar County0.21151.53
4Lee County2.0681.49
5Washington County1.4941.38
6Mercer County0.9711.37
7De Witt County1.2801.35
8Putnam County0.3711.33
9Marshall County1.4681.32
10Vermilion County1.41381.31
11Rock Island County2.11481.16
12Whiteside County1.81241.12
13Jefferson County2.6721.08
14LaSalle County2.21261.06
15Warren County1.6581.05
16Douglas County0.6941.03
17Bureau County1.4771.02
18Hancock County1.0840.92
19Knox County2.3560.91
20Christian County1.0610.89
20Kankakee County1.8740.89
20Monroe County1.1950.89
23Logan County1.2720.88
24Crawford County0.4710.81
24Morgan County0.81210.81
26Adams County0.9490.80
26Livingston County1.7550.80
28Clark County0.6600.78
28Ogle County2.2840.78
28Sangamon County0.72200.78
31Henry County1.11130.77
31Perry County1.4450.77
31St. Clair County2.41150.77
34Lawrence County0.8290.76
35Franklin County2.1230.75
35Macon County2.01140.75
37Peoria County2.9560.74
38Woodford County1.6560.71
39Piatt County0.3760.70
39Shelby County1.1580.70
41Fayette County1.2270.69
42Pike County0.7300.68
43Randolph County1.3460.65
44Marion County1.2480.63
45Carroll County1.0330.61
46Stephenson County1.4600.58
47Winnebago County2.21180.56
48Tazewell County2.3600.53
49Madison County2.71080.52
50Grundy County1.7430.50
51McHenry County2.1720.49
52Jo Daviess County0.8460.45
52Macoupin County1.2450.45
54Jasper County0.2200.44
55Will County1.3790.43
56Bond County0.3180.41
56McDonough County0.61020.41
56Montgomery County0.9360.41
56Saline County1.1180.41
60Clinton County1.1260.40
60Fulton County0.9480.40
62Brown County0.1150.39
62Champaign County1.21190.39
64Cumberland County0.3230.37
64Jackson County1.3480.37
66Greene County0.1300.35
66Williamson County0.8230.35
68Coles County0.4740.34
68McLean County1.21120.34
70Johnson County0.4220.33
71DeKalb County1.9430.32
71Iroquois County0.4240.32
71Mason County0.3140.32
71Union County0.2100.32
75Boone County1.4520.30
75Cook County0.81060.30
75Ford County0.2100.30
78DuPage County1.3640.28
79Clay County0.4170.27
79Richland County0.3210.27
81Kane County2.0710.26
81Lake County1.9570.26
83Jersey County0.3160.24
84Edwards County0.1150.23
84Schuyler County0.180.23
86Moultrie County0.3390.22
87Hamilton County0.4320.21
88Menard County0.2200.19
89Effingham County0.2130.18
89Kendall County1.3420.18
91Cass County0.0None0.15
91White County0.1150.15
93Massac County0.1140.13
93Wayne County0.1120.13
95Wabash County0.0None0.03

Rank uses outage time per resident. Times US rate compares each county with the national average.

When outages hit Illinois

Share of the state's customer-hours by month.

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JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Not rated

These counties have short histories, very small populations, or customer counts that look too high for the population.