Graeme C. Gibson CM (9 August 1934 – 18 September 2019) was a Canadian novelist. He was a Member of the Order of Canada (1992). He was one of the organizers of the Writer's Union of Canada (chair, 1974–75). He was also a founder of the Writers' Trust of Canada.
Gibson was in a partnership with fellow Canadian novelist Margaret Atwood from 1973 until his death.
In April 2017, Gibson was diagnosed with dementia. He died on 18 September 2019 in a hospital in London, England at the age of 85.