Mary Lawson (born 1946) is a Canadian novelist.
Born in southwestern Ontario, she spent her childhood in Blackwell, Ontario (located between Sarnia and Brights Grove) and is a distant relative of L. M. Montgomery, author of Anne of Green Gables.
Lawson moved to England after graduating from McGill University with a psychology degree in 1968. She also married in Ontario, has two grown up sons and now lives in Kingston-Upon-Thames, Surrey. Her three novels to date, both published by Knopf Canada were set in Northern Ontario.