Anna Eliza Jenkins (10 September 1886 – 26 November 1972) was an American mycologist. She specialized in phytopathology (plant diseases), particularly the fungi responsible for "spot anthracnoses", including Sphaceloma and Elsinoe.
Born on a farm near Walton, New York, Jenkins attended a one-room country school before attending Walton High School, from which she graduated in 1907. Leaving home to study at Cornell University in Ithaca, New York, Jenkins was influenced and encouraged by the prominent mycologists Herbert Hice Whetzel and Louis Melville Massey. She earned her B.Sc. degree in 1911 and her master's degree the year following. A PhD followed later in 1927, after further study at George Washington University and graduate work at Cornell.
Jenkins started working with the United States Department of Agriculture (USDA) in 1912, and spent most of her career there. Her early research involved the taxonomy and life histories of new of little-known fungi of economic importance. Later, she studied fungi causing crop diseases, such as Sclerotinia on mulberry, Botryosphaeria on hemp, Elsinoe on lima beans, and pathogens of roses.