Susan Keating Glaspell (July 1, 1876 – July 27, 1948) was an American Pulitzer Prize-winning playwright, actress, novelist, and journalist. With her husband George Cram Cook she founded the Provincetown Players, the first modern American theater company.

A prolific writer, Glaspell is known to have composed nine novels, fifteen plays, over fifty short stories, and one biography. Often set in her native Iowa, these semi-autobiographical tales frequently address contemporary issues, such as gender, ethics, and dissent, while featuring deep, sympathetic characters who make principled stands.