Mackinac CountyPower Outage History
What this grade means
Bottom 20% least reliable nationally — frequent and/or long outages. This county ranks in the least reliable fifth of all US counties in our dataset: some combination of frequent outages, long restoration times, or customers affected puts it near the bottom nationally. Backup power is worth prioritizing here rather than treating it as optional.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 30, 2025 | 662 hrs | 7,585 (87%) | Ice Storm |
| Dec 16, 2021 | 77 hrs | 4,474 (51%) | High Wind |
| Nov 5, 2022 | 46 hrs | 3,480 (40%) | Unnamed event |
| Jun 10, 2021 | 7 hrs | 3,367 (38%) | Unnamed event |
| Apr 12, 2023 | 184 hrs | 3,075 (35%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Mackinac County, Michigan that day.
Over the 7 years from 2019 to 2025, Mackinac County recorded 607 distinct power outage events, averaging 7.7 hours per event.
The single worst outage on record in Mackinac County started March 30, 2025 (Ice Storm), lasting 662 hours and leaving up to 7,585 customers without power (87% of the county) at its peak.
November has historically been the worst month for outages in Mackinac County, with 77 events recorded during that month across the dataset.
Based on this history, Mackinac County earns a Reliability Grade of F, placing it in the 7th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Mackinac County.
| County | Grade | National percentile |
|---|---|---|
| Missaukee County | F | 7th |
| Lake County | F | 7th |
| Hillsdale County | F | 7th |
| Sanilac County | F | 8th |
| Livingston County | F | 8th |
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 Mackinac County?
Between 2019 and 2025, Mackinac County recorded 607 outage events, averaging 7.7 hours each.
What is Mackinac County's reliability grade?
Mackinac County has a Reliability Grade of F, in the 7th national percentile.
What was the worst power outage in Mackinac County?
The worst outage on record started March 30, 2025 (Ice Storm), lasting 662 hours and affecting up to 7,585 customers.