| Honorific-Prefix: | The Honourable |
| Diane Griffin | |
| Honorific-Suffix: | OPEI |
| Office: | Deputy Leader of the Canadian Senators Group |
| Predecessor: | Josée Verner |
| Leader: | Scott Tannas |
| Successor: | Dennis Patterson |
| Term Start: | May 14, 2021 |
| Term End: | March 18, 2022 |
| Office1: | Senator for Prince Edward Island |
| Nominator1: | Justin Trudeau |
| Appointed1: | David Johnston |
| Term Start1: | November 10, 2016 |
| Term End1: | March 18, 2022 |
| Birth Date: | 18 March 1947 |
| Party: | Canadian Senators Group |
| Otherparty: | Independent Senators Group (2017-2019) |
Diane Griffin, OPEI (born March 18, 1947) is a Canadian conservationist from Prince Edward Island. Griffin is a former provincial deputy minister of environmental resources and a recipient of the Governor General's Conservation Award, the Queen Elizabeth II Diamond Jubilee Medal and the P.E.I. Environment award.[1] She also served as executive director of the Island Nature Trust.[1] In 2010, Griffin was awarded the Prince Edward Island Medal of Merit for her contributions to the environment of the province.[2] On October 27, 2016, Griffin was named to the Senate of Canada by Prime Minister Justin Trudeau to sit as an independent.[3] Until her appointment, she served as a councillor on the Stratford, P.E.I. town council. Griffin assumed office on November 10, 2016. She subsequently jointed the Independent Senators Group. On November 4, 2019, she joined the Canadian Senators Group.[4] After turning 75 on March 18, 2022, Senator Griffin retired from the senate due to mandatory retirement rules.