The 18th Quebec Legislature is the provincial legislature that existed in Quebec, Canada from August 24, 1931, to October 30, 1935. The Liberal Party led by Louis-Alexandre Taschereau had a majority of seats in the Legislative Assembly of Quebec and remained in power in the government.
| Affiliation | Members | |
| Liberal | 79 | |
| Conservative | 11 | |
| Total |
90 | |
| Government Majority |
68 | |
This was the list of members of the Legislative Assembly of Quebec that were elected in the 1931 election:
Other MLAs were elected in by-elections during the term