All municipalities in the Canadian province of Ontario held municipal elections on December 6, 1976, to elect mayors or reeves, councillors, and school board trustees. Some areas also held local referendums.

David Crombie, a Red Tory, was re-elected as mayor of Toronto without serious opposition.

• Margaret Martyr
• Margaret Mary Butler
• Margaret Mary Healy Murphy
• Margaret Mary Lockwood Day
• Margaret Mary Moran
• Margaret Mary Plues
• Margaret Mary Smith
• Margaret mary smith
• Margaret Masson
• Margaret Masterman Braithwaite
• Margaret Matilda White
• Margaret Matson
• Margaret M'Avoy
• Margaret May Giles
• Margaret Mayo (Children's author)
• Margaret McAvoy
• Margaret McCarthy
• Margaret McCurry
• Margaret McDonald (voice actor)
• Margaret McEntee
• Margaret McFall-Ngai
• Margaret McFarland
• Margaret McGovern
• Margaret McGowen
• Margaret M. Chiara