Skip Links
Get Involved > Regional Planning

Regional Planning

Thumbnail of Map of the 21 planning regions in Ontario

Regional Planning Dashboard

This dashboard provides an overview of regional planning activities across Ontario. Get up-to-date with this biannual status update on all planning regions, their public touch points, and the progress and highlights of ongoing Scoping Assessments and IRRPs.

View the Regional Planning Status Map

Regional Planning Dashboard | January 2023

Regional Planning

A reliable supply of electricity is essential to supporting community growth – powering homes, schools, businesses, hospitals and transportation. Engaging with communities is an important part of maintaining a reliable electricity supply, now and in the future.

GTA and Central Ontario

The five planning regions and sub-regions in the GTA and Central Ontario area includes all of the Greater Toronto Area, stretches north to Parry Sound/Muskoka, and roughly spans the area from Meaford to Minden.

East Ontario

The East Ontario area includes four planning regions that spans the area from Port Hope to the Ottawa Valley and Renfrew.

Southwest Ontario

The seven planning regions and sub-regions in Southwest Ontario span from Windsor to Niagara and north to Bruce County.

Northeast Ontario

The four planning regions in Northeast Ontario span from Sudbury/Algoma to north of Moosonee.

Northwest Ontario

The Northwest regional planning area includes the area roughly bounded by Lake Superior to the south, the Marathon area to the east, and the Manitoba border to the west. It includes the districts of Kenora, Rainy River and Thunder Bay.

Planning Information

The IESO is committed to being open and transparent about information that informs power system plans. Data pertaining to Ontario’s demand, demand and supply outlooks, and system capabilities is regularly maintained on the IESO website. Information specific to a particular system plan is generally provided through the dedicated regional/bulk plan web page or through the plan engagements. General planning or system information (such as the asset demographic information referenced below) will also continue to be made accessible from this page.

The IESO has collaborated with Hydro One on a process to make asset demographic information (such as asset age) for categories of major transmission assets available to interested parties. This information is important for long-term planning as it informs when assets will approach their end-of-life. This information will be updated every five years. To obtain this asset demographic information, interested parties must complete the request form and submit to