Marie Hall Ets (December 16, 1895 in Milwaukee, Wisconsin – January 17, 1984 in Inverness, Florida) was an American writer and illustrator who is best known for children's picture books. She attended Lawrence College, and in 1918, Ets journeyed to Chicago where she became a social worker at the Chicago Commons, a settlement house on the northwest side of the city. There she met Ines Cassettari, an immigrant from Italy who worked at the settlement. Ets transcribed Cassettari's autobiography, and the book was later published as Rosa: The Life of an Italian Immigrant.