ESB crews are working to restore power to hundreds of homes and businesses across the county.
The outages are mainly caused by fallen trees hitting power lines in strong winds last night.
200 customers are affected in Kenmare, Killorglin, Kilgarvan, and Flynnfield, while more than 100 customers in Clounduff and Anascaul remain without power.
The ESB are on site and hope power will be restored in those areas within the next two hours.
Meanwhile, customers in Causeway and Ballyheigue who are still without power, should see it return in the next hour.