Ontario By-Elections Preserve Status Quo as PCs Defend Two Ridings and NDP Retains Scarborough

In a trio of closely monitored provincial by-elections held on September 3, 2026, Ontario voters preserved the existing legislative balance of power at Queen's Park, re-electing the governing Progressive Conservatives in two ridings and confirming the Official Opposition New Democratic Party in a key Greater Toronto Area stronghold.

The simultaneous contests in York—Simcoe, Hamilton East—Stoney Creek, and Scarborough Southwest served as a midterm barometer of party momentum amid debates over public transit investments, healthcare waitlists, and housing affordability across southern Ontario. In York—Simcoe, Progressive Conservative nominee Susan Lahey achieved a decisive victory, retaining the rural-suburban constituency for the governing party following the resignation of veteran cabinet minister Caroline Mulroney earlier this summer.

In Hamilton East—Stoney Creek, PC candidate Jeff Beattie secured victory in a contested race against the Ontario NDP and Ontario Liberals, holding the industrial Niagara Peninsula seat vacated by retired minister Neil Lumsden. Meanwhile, in Scarborough Southwest, Ontario NDP candidate Fatima Shaban fended off a determined challenge from the governing Tories and Liberals to retain the seat for Official Opposition Leader Marit Stiles’ caucus, filling the vacancy created by the departure of former MPP Doly Begum.

Addressing party supporters, Premier Doug Ford praised the electoral outcomes as an endorsement of his government’s infrastructure mandate, pointing to highway expansions and manufacturing sector incentives as key drivers of voter confidence. For the Ontario NDP, retaining Scarborough Southwest confirmed the party’s grassroots resilience in urban constituencies, offering Stiles crucial momentum heading into the fall legislative sitting.

Elections Ontario reported that voter turnout across the three ridings aligned with historic by-election averages, with advance voting and mail-in ballots reflecting steady civic participation. The outcome leaves Premier Ford’s Progressive Conservative caucus with an entrenched majority in the Legislative Assembly of Ontario as lawmakers prepare to return for autumn legislative business.