| Cyrille Dumaine | |
| Constituency Mp: | Bagot |
| Parliament: | Canadian |
| Predecessor: | Georges Dorèze Morin |
| Successor: | District merged with St. Hyacinthe—Rouville |
| Term Start: | 1930 |
| Term End: | 1935 |
| Office2: | Member of the Legislative Assembly of Quebec for Bagot |
| Predecessor2: | Joseph-Émery Phaneuf |
| Successor2: | Philippe Adam |
| Term Start2: | 1935 |
| Term End2: | 1938 |
| Predecessor3: | Philippe Adam |
| Successor3: | Daniel Johnson Sr. |
| Term Start3: | 1939 |
| Term End3: | 1946 |
| Office4: | 24th Speaker of the Legislative Assembly |
| Predecessor4: | Valmore Bienvenue |
| Successor4: | Alexandre Taché |
| Term Start4: | 1943 |
| Term End4: | 1945 |
| Birth Date: | 8 July 1897 |
| Birth Place: | Saint-Hugues, Quebec |
| Death Place: | Ottawa, Ontario |
| Party: | Federal: Liberal Provincial: Quebec Liberal Party |
Cyrille Dumaine (July 8, 1897 – October 11, 1946) was a Canadian politician from Quebec. He was born on July 8, 1897, in Saint-Hugues and was a notary.
Dumaine successfully ran as a Liberal Party of Canada candidate for the Bagot district in a 27 January 1930 by-election. He was re-elected there in the 1930 federal election. He did not run for re-election in the 1935 election.
He ran as a Liberal Party of Quebec candidate in the 1935 election for the district of Bagot and won. He was re-elected in the 1936 election, but his election was cancelled and he lost the subsequent by-election against Union Nationale candidate Philippe Adam.
Dumaine was re-elected in the 1939 and 1944 elections.
He served as Deputy Speaker from 1942 to 1943 and as Speaker of the House from 1943 to 1945.
Dumaine died in office on October 11, 1946. He was succeeded by Union Nationale politician Daniel Johnson Sr.
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