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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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Welcome to the New

IESO’s new website includes features and functionalities that deliver enhanced value. Along with a fresh, modern look, we’ve streamlined content and consolidated several websites. Here's a guide to help you navigate the new site and find the information you need.

Have comments or suggestions? We’d like to hear from you, email

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Evolving Ontario's Electricity Market

To prepare for the electricity sector of tomorrow, the IESO is working with stakeholders to pursue changes to Ontario’s electricity market through the Market Renewal project. This project will modernize the Ontario electricity market to improve market efficiency and unlock future opportunities for all participants.

Read more about Market Renewal.

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Regional Electricity Planning in Ontario 

Electricity planning looks at the unique needs of Ontario’s many diverse regions, and includes a strong commitment to public participation and community engagement.

Get involved in Regional Planning and Community Engagement.

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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