Sarah Harrison (born 1946) is an English novelist.
Born in Exeter, she is the second of three children of an army officer and a former actress, and a cousin of the novelist Celia Dale. The family spent time during her childhood in Berlin, Singapore, Malaya, then Germany again, before she was sent to boarding school at the age of nine. She took an English degree at the University of London, then worked for four years on the magazine Woman's Own before becoming a freelance writer. Harrison married for the second time in 2003. She has three grown-up children and four grandchildren. She is president of Morden and District Writers' Circle and a member of the Morden Players drama group, both based in Steeple Morden, Cambridgeshire.