The 5th Parliament of Ontario was in session from February 27, 1883, until November 15, 1886, just prior to the 1886 general election. The majority party was the Ontario Liberal Party led by Oliver Mowat.
- Algoma split into Algoma East and West on February 1, 1885
- died in 1884
- died in 1885
- unseated after an appeal
- declared "incurably insane" in 1883