About the Ministry

The Ministry of Energy works with many partners inside and outside of government to develop the electricity generation, transmission and other energy-related facilities that help power our economy—and to ensure that Ontario remains one of the best places in the world in which to live, work, invest and raise a family.

A top priority is ensuring that Ontario’s electricity needs are met in a sustainable manner. Developing renewable energy sources and fostering a conservation-oriented culture are cornerstones of Ontario’s balanced plan to provide clean, and reliable energy—while encouraging the development of a clean energy economy for our future.

Agencies and Corporations

The Ministry also has legislative responsibility for several agencies, including:

The Independent Electricity System Operator logo

The Independent Electricity System Operator (IESO) manages the reliability of Ontario’s power system and forecasts the demand and supply of electricity. The IESO also operates the wholesale electricity market, while ensuring fair competition through market surveillance.


Hydro One logo

Hydro One is a provincially-owned company that operates the majority of Ontario’s transmission lines. Hydro One also serves as an electricity local distribution company in some areas of the province.


Ontario Energy Board logo

The Ontario Energy Board (OEB) is an independent adjudicative tribunal responsible for regulating Ontario’s natural gas and electricity sectors. Part of the OEB’s mandate is to protect the interests of consumers with respect to prices and the reliability and quality of electricity service.


Ontario Power Generation logo

Ontario Power Generation (OPG) is a provincially-owned electricity generation company — its hydroelectric, nuclear and fossil fuel stations generate approximately 60% of Ontario’s electricity.