Angie Elbertha Debo (January 30, 1890 – February 21, 1988), was an American historian who wrote 13 books and hundreds of articles about Native American and Oklahoma history. After a long career marked by difficulties (ascribed both to her gender and to the controversial content of some of her books), she was acclaimed as Oklahoma's "greatest historian" and acknowledged as "an authority on Native American history, a visionary, and an historical heroine in her own right."