The 18th Legislative Assembly of Ontario was in session from October 30, 1929, until May 16, 1934, just prior to the 1934 general election.
George Stewart Henry replaced Ferguson as party leader and Premier in December 1930 after Ferguson was named Canadian High Commissioner in London.
Thomas Ashmore Kidd served as speaker for the assembly.
Italicized names indicate members (as well as Edward Dunlop) returned by acclamation.
Italicized names indicate members (as well as Charles McCrea) returned by acclamation.