Lucy Baldwin, Countess Baldwin of Bewdley (née Ridsdale; 1869–1945), was an English writer and activist for maternal health. Born Lucy Ridsdale in Bayswater, London, she was the oldest daughter of Edward Lucas Jenks and Esther Lucy Ridsdale. Known as "Cissie," she grew up in Rottingdean, Sussex, with her sister and three brothers, including Aurelian Ridsdale, who became a Member of Parliament.
She married Stanley Baldwin on 12 September 1892, and remained his wife until her death in 1945.