Cornelia Peake McDonald (June 14, 1822 – January 11, 1909) was an American diarist who was the author of A Diary with Reminiscences of the War and Refugee Life in the Shenandoah Valley, 1860-1865 in which she recaps her life as a woman living in Winchester, Virginia. Her writing is significant as it recaps the views of the American Civil War from the point of a view of a woman living in one of the most frequently re-occupied towns of the conflict. She became known as one of the "Devil Diarists of Winchester." She was buried beside her husband in Hollywood Cemetery in Richmond, Virginia.