Karen Walton is a Canadian screenwriter.
A native of Halifax, Nova Scotia, Karen Walton wrote the film Ginger Snaps, for which she won a Best Film Writing Canadian Comedy Award in 2002. She later wrote for the Canadian television series What It's Like Being Alone and also for three episodes of the American version of Queer as Folk, where she also served as executive story consultant.
She appeared in the 2009 documentary Pretty Bloody: The Women of Horror.
In recent years, she has served as a writer or writer/producer on Canadian television series including Flashpoint, The Listener and Orphan Black, which is distributed by BBC Worldwide and airs on BBC America in the United States.