Ohio CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 11, 2021 | 84 hrs | 9,485 (67%) | Tornado |
| May 27, 2017 | 10 hrs | 5,222 (37%) | Thunderstorm Wind |
| Jun 29, 2023 | 37 hrs | 4,863 (34%) | Thunderstorm Wind |
| Mar 3, 2023 | 128 hrs | 4,528 (32%) | High Wind |
| Oct 22, 2015 | <1 hr | 3,618 (26%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Ohio County, Kentucky that day.
Over the 12 years from 2014 to 2025, Ohio County recorded 531 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Ohio County started December 11, 2021 (Tornado), lasting 84 hours and leaving up to 9,485 customers without power (67% of the county) at its peak.
July has historically been the worst month for outages in Ohio County, with 83 events recorded during that month across the dataset.
Based on this history, Ohio County earns a Reliability Grade of C, placing it in the 43rd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Kentucky
Counties with the closest reliability grade and national percentile to Ohio County.
| County | Grade | National percentile |
|---|---|---|
| Ballard County | C | 44th |
| Lincoln County | C | 42nd |
| Gallatin County | C | 42nd |
| Whitley County | C | 45th |
| Spencer County | C | 41st |
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 Ohio County?
Between 2014 and 2025, Ohio County recorded 531 outage events, averaging 2.6 hours each.
What is Ohio County's reliability grade?
Ohio County has a Reliability Grade of C, in the 43rd national percentile.
What was the worst power outage in Ohio County?
The worst outage on record started December 11, 2021 (Tornado), lasting 84 hours and affecting up to 9,485 customers.