Marion County Power Outage History
2014–2025 · Indiana
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 18, 2025 | 111 hrs | 66,663 (13%) | Thunderstorm Wind |
| Jun 29, 2023 | 2 hrs | 65,956 (13%) | Thunderstorm Wind |
| Jun 29, 2023 | 3 hrs | 65,427 (13%) | Thunderstorm Wind |
| Jun 30, 2023 | 16 hrs | 61,837 (12%) | Thunderstorm Wind |
| Sep 27, 2024 | 113 hrs | 58,108 (12%) | Tropical Storm Helene |
Over the 12 years from 2014 to 2025, Marion County recorded 4,406 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Marion County started June 18, 2025 (Thunderstorm Wind), lasting 111 hours and leaving up to 66,663 customers without power (13% of the county) at its peak.
June has historically been the worst month for outages in Marion County, with 568 events recorded during that month across the dataset.
Based on this history, Marion County earns a Reliability Grade of C, placing it in the 53rd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Indiana
Counties with the closest reliability grade and national percentile to Marion County.
| County | Grade | National percentile |
|---|---|---|
| Vanderburgh County | C | 53rd |
| Franklin County | C | 53rd |
| Putnam County | C | 54th |
| Sullivan County | C | 53rd |
| Madison County | C | 55th |
FAQ
How often does power go out in Marion County?
Between 2014 and 2025, Marion County recorded 4,406 outage events, averaging 2.0 hours each.
What is Marion County's reliability grade?
Marion County has a Reliability Grade of C, in the 53rd national percentile.
What was the worst power outage in Marion County?
The worst outage on record started June 18, 2025 (Thunderstorm Wind), lasting 111 hours and affecting up to 66,663 customers.