Mary-Margaret
Your MPP for Beaches—East York
Your voice at Queen's Park.
Mary-Margaret McMahon is the MPP for Beaches–East York and the Ontario Liberal critic for Environment and Climate Change. A lifelong environmentalist and former Toronto City Councillor, she’s known for turning big ideas into action—from championing laneway housing to launching the city’s first climate adaptation plan. At Queen’s Park, she’s focused on building a greener, fairer Ontario where communities—and people—can truly thrive.