Knox CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 5, 2023 | 9 hrs | 22,269 (54%) | Unnamed event |
| Jun 14, 2022 | 140 hrs | 21,067 (51%) | Thunderstorm Wind |
| Sep 11, 2020 | <1 hr | 7,472 (18%) | Thunderstorm Wind |
| Sep 11, 2020 | <1 hr | 7,472 (18%) | Thunderstorm Wind |
| Sep 11, 2020 | <1 hr | 7,472 (18%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Knox County, Ohio that day.
Over the 12 years from 2014 to 2025, Knox County recorded 521 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Knox County started July 5, 2023, lasting 9 hours and leaving up to 22,269 customers without power (54% of the county) at its peak.
June has historically been the worst month for outages in Knox County, with 65 events recorded during that month across the dataset.
Based on this history, Knox County earns a Reliability Grade of D, placing it in the 37th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Ohio
Counties with the closest reliability grade and national percentile to Knox County.
| County | Grade | National percentile |
|---|---|---|
| Clinton County | D | 37th |
| Holmes County | D | 36th |
| Preble County | D | 37th |
| Trumbull County | D | 36th |
| Scioto County | D | 38th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Knox County?
Between 2014 and 2025, Knox County recorded 521 outage events, averaging 3.1 hours each.
What is Knox County's reliability grade?
Knox County has a Reliability Grade of D, in the 37th national percentile.
What was the worst power outage in Knox County?
The worst outage on record started July 5, 2023, lasting 9 hours and affecting up to 22,269 customers.