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Connecting Today.
Powering Tomorrow.

The Independent Electricity System Operator (IESO) works at the heart of Ontario's power system. The IESO delivers key services across the electricity sector including: managing the power system in real-time, planning for the province's future energy needs, enabling conservation and designing a more efficient electricity marketplace to support sector evolution. 

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Spotlight on Roles in Electricity Sector

Ever wonder who does what in the electricity sector to make sure that the lights stay on and electricity is safely delivered to your home or business?

See Overview of Sector Roles for a description of the various entities and the roles they play to ensure that the system is always ready to meet Ontario’s electricity needs now and into the future.

The’s Learn section is presented for readers who would like to learn more about Ontario’s electricity sector.

2019 Calendar Corporate IESO

Order Your 2019 IESO Calendar

From tackling cyber threats and extreme weather, to collaborating with communities and engaging in market renewal activities, the IESO’s calendar features examples of how the IESO is ensuring the reliability of Ontario’s power system – one month and one initiative at a time.

To order a copy, please email with your name and mailing address by Tuesday, December 18.

Market Renewal Sector Participants

Educational Presentations Available

The IESO hosted a number of education and awareness building sessions throughout the month of December. The purpose of these targeted sessions was to provide a practical understanding to consumers, generators, traders and others, of the key aspects of the energy stream high-level designs within the Market Renewal Program.

To view the presentations, please see Market Renewal Education and Awareness Sessions. 

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Kilowatt Way

Whether you live in an apartment or a house – four quick questions will reveal how you use electricity and show you ways to become more energy efficient.

Visit Kilowatt Way