| Roméo Gagné | |
| Office: | Member of the Legislative Assembly of Quebec for Rivière-du-Loup |
| Predecessor: | Léon Casgrain |
| Successor: | Alphonse Couturier |
| Term Start: | 1948 |
| Term End: | 1956 |
| Birth Date: | 15 September 1905 |
| Birth Place: | Mont-Joli, Quebec |
| Death Place: | Rivière-du-Loup, Quebec |
| Party: | Union Nationale |
Roméo Gagné (September 15, 1905 - August 2, 1959) was a Canadian politician and a two-term Member of the Legislative Assembly of Quebec.
He was born on September 15, 1905, in Mont-Joli, Bas-Saint-Laurent.
Gagné was a city councillor in Rivière-du-Loup from 1945 to 1951.
He ran as a Union Nationale candidate in the 1944 and 1948 elections against Liberal incumbent Léon Casgrain in the district of Rivière-du-Loup. He lost the first time, but was successful on his second attempt.
Gagné was re-elected in the 1952 election, but did not run for re-election in the 1956 election.
Casgrain died on August 2, 1959.