Sierra Club Ontario is a grassroots volunteer-driven organization, and we are the provincial Chapter of Sierra Club Canada. Our most important work is accomplished by member-volunteers. We provide a framework within which you, as a member, get to decide for yourself what campaigns you'd like to pursue and how you'd like to contribute.

You get to do what interests you the most, and there’s a lot to choose from. You can even create your own campaigns: if you see an ecological disaster looming on the horizon, you can do something about it. Our staff provides guidance and support to our volunteer leaders and membership.