Mary Augusta Hoover Aiken ( – ) was an American painter. She was the third wife and widow of Pulitzer-Prize winning poet Conrad Aiken.
Mary Augusta Hoover was born on in Cuba, New York, the daughter of a civil engineer. She grew up in Washington, DC, where she attended Central High School and studied painting at the Corcoran School of Art. She later studied with Charles Hawthorne, Edwin Dickinson, and George Luks and earned scholarships to study in Fontainebleau and in Munich at the Königliche Kunstgewerbeschule München.
Spanish painter Luis Quintinilla selected Hoover to assist him in painting two large frescos called Ignorancia and Conciencia at the Ciudad Universitaria de Madrid. Due to growing violence in the years before the Spanish Civil War, she left the Spanish mainland for Santa Eulalia on the island of Ibiza in 1933. There she spent almost two years painting. One of the paintings she completed on Ibiza was Café Fortune Teller (1933), now in the collection of the Telfair Museum. Hoover depicts herself telling her fortune with a deck of cards in the café below her Ibiza hotel. Of her time in Spain, she said "An American girl may be escorted to a night club by a Spaniard who in no circumstances would take his wife there."
When she returned to the United States, her art career blossomed. She was featured in over a dozen art shows in two years and the Metropolitan Museum of Art would later purchase two of her paintings.