| Honorific-Prefix: | The Honourable |
| Suzanne Blais-Grenier | |
| Office2: | Minister of the Environment |
| Primeminister2: | Brian Mulroney |
| Term Start2: | September 17, 1984 |
| Term End2: | August 19, 1985 |
| Predecessor2: | Charles Caccia |
| Successor2: | Thomas McMillan |
| Parliament3: | Canadian |
| Riding3: | Rosemont |
| Term Start3: | September 4, 1984 |
| Term End3: | November 21, 1988 |
| Predecessor3: | Claude-André Lachance |
| Successor3: | Benoît Tremblay |
| Birth Date: | 2 March 1936 |
| Party: | Independent (1988–2017) |
| Otherparty: | Progressive Conservative Party (1984–1988) |
Suzanne Blais-Grenier (March 2, 1936 - June 13, 2017) was a Canadian politician.
Blais-Grenier was elected to the House of Commons of Canada in the 1984 federal election that brought Brian Mulroney to power. She represented the riding of Rosemont, Quebec. She was appointed to the Cabinet as Prime Minister Mulroney's first Minister of the Environment.
She faced mounting criticism from environmentalists following cuts to various programs, her lackluster performance over several months when being targeted by the Opposition in the House of Commons during question period and her spending on foreign travel. Blais-Grenier was demoted in 1985 to the position of Minister of State for Transport.
Following the demotion, Blais-Grenier became increasingly critical of the Mulroney government. At the end of 1985, she resigned from Cabinet to protest the government's refusal to prevent the closure of an oil refinery in Montreal.
On September 20, 1988, she was expelled from the Progressive Conservative caucus for refusing to withdraw allegations of kickbacks involving the Quebec wing of the party. She ran as an independent candidate in the November 1988 general election, but was defeated by Progressive Conservative Benoît Tremblay, and came in fourth place with 2,060 votes.