1st Parliament of Ontario

1st Parliament of Ontario
Coalition parliament
Sep. 3, 1867 – Feb. 25, 1871
Parliament leaders
PremierJohn Sandfield Macdonald
Party caucuses
GovernmentConservative Party
OppositionLiberal Party
* Coalition government
Legislative Assembly
Speaker of the
Assembly
John Stevenson
→ 2nd

The 1st Parliament of Ontario was the inaugural legislature of the Province of Ontario following Canadian Confederation. Its composition was determined by the 1867 Ontario general election held in conjunction with the first Canadian federal election over several weeks in August and September. It was in session from December 27, 1867, until February 25, 1871, just prior to the 1871 general election.

This parliament along with the 1st Quebec Legislature and the 1st Canadian Parliament were joint successor-legislatures of the 8th Parliament of the Province of Canada, the final composition of the Legislative Assembly of the Province of Canada.

John Stevenson served as speaker for the assembly.