The 1st Parliament of Ontario was in session from September 3, 1867, until February 25, 1871, just prior to the 1871 general election. This was the first session of the Legislature after Confederation succeeding the Legislative Assembly of the Province of Canada. The 1867 general election produced a tie between the Conservative Party led by John Sandfield Macdonald and the Liberal Party led by Archibald McKellar. Macdonald led a coalition government with the support of moderate Liberals.

The 1871 Ontario general election was the second general election held in the Province of Ontario, Canada. It was held on March 21, 1871, to elect the 82 Members of the 2nd Legislative Assembly of Ontario ("MLAs").