The 2023 Hamilton Centre provincial by-election is scheduled for March 16, 2023. Background Constituency The Hamilton Centre constituency consists of the part of the City of Hamilton bounded by a line drawn south from the city limit along Ottawa Street, west along the Niagara Escarpment, southwest along James Mountain Road, south along West 5th Street, west along Lincoln M. Alexander Parkway, north along the hydroelectric transmission line situated west of Upper Horning Road, northeast along Highway No. 403, east along the Desjardins Canal to Hamilton Harbour. Trigger On July 26, 2022, Horwath announced her candidacy for mayor of Hamilton, and resigned her seat in the provincial legislature on August 15, 2022. Candidates Sarah Jama, Ontario New Democratic Party Peter Wiesner, Progressive Conservative Party of Ontario Deirdre Pike, Ontario Liberal Party Lucia Iannantuono, Green Party of Ontario Lee Weiss Vassor, New Blue Party of Ontario Nathalie Xian Yi Yan, Independent Previous result References Politics of Ontario Hamilton, Ontario Provincial by-elections in Ontario 2023 elections in Canada 2023 in Ontario March 2023 events in Canada