Ontario
- Bullfrog Power
- Ontario Power Generation
- Hydro One
- Enersource
- Hydro Ottawa
- London Hydro
- Thunder Bay Hydro
- Toronto Hydro
- Toronto Electric Light Company
- Bruce Power
- PowerTel Utilities Contractors Limited
- Rideau St-Laurence Power Distribution
- Enersource Hydro Mississauga
- PowerStream
- Horizon Utilities
- Oakville Hydro
- Burlington Hydro
- Veridian
- Lakefront Utilities Inc
Read more about this topic: List Of Canadian Electric Utilities