Leader of the Opposition

In the Legislative Assembly of Ontario, the leader of the Official Opposition is the leader of the largest political party (or group of parties) not in government and typically the second-largest party. The position is referred more formally as the leader of His Majesty's Loyal Opposition; under the Westminster system, while the parliamentary opposition opposes the incumbent government, it remains loyal to the Crown and thus to Canada. Marit Stiles has served as the leader of the Official Opposition since February 4, 2023. She leads the New Democratic Party (NDP), which has held the second largest number of seats in the Legislative Assembly since the 2018 provincial election. History Ontario's first Leader of the Official Opposition was Edward Blake of the Ontario Liberal Party who held the position from 1869 until 1871 when he became Premier of Ontario (Archibald McKellar had previously led the Liberal Party in the legislature for two years, but was not formally recognized as opposition leader). Ten Leaders were Premier before after they served this post.