| Fabien Cordeau | |
| Office: | Member of the National Assembly of Quebec for Saint-Hyacinthe |
| Predecessor: | Fernand Cornellier |
| Successor: | Maurice Dupré |
| Term Start: | 1976 |
| Term End: | 1981 |
| Birth Date: | 24 March 1923 |
| Birth Place: | Saint-Pie, Quebec |
| Death Place: | Saint-Hyacinthe, Quebec |
| Party: | Union Nationale |
Fabien Cordeau (March 24, 1923 - September 27, 2007) was a politician in Quebec, Canada.
He was born on March 24, 1923, in Saint-Pie, Quebec.
Cordeau served as a city councillor in Saint-Hyacinthe from 1973 to 1988.
He ran as a Union Nationale candidate to the provincial legislature in the district of Saint-Hyacinthe in the 1976 election and won against both Liberal incumbent Fernand Cornellier and Parti Québécois (PQ) candidate Charles-Henri Tremblay. He lost the 1981 election against PQ candidate Maurice Dupré.
Cordeau died on September 27, 2007.