American author who espoused feminism and social reform in her fiction, journalism, and poetry.

Le Sueur grew up on the Midwestern plains, where she was influenced by her family's heritage of social and political activism and by the stories and poetry she heard from Native American women. She quit high school, acted in silent films, and began writing fiction and working as a journalist in the late 1920s. Traveling throughout the United States, she reported for left-wing newspapers, including the Daily Worker and New Masses, on such topics as unemployment, migrant workers, strikes, and the struggles of Native Americans for autonomy.

The lives of women during the Great Depression were the subject of her first novel, The Girl. Although she wrote it in 1939, the novel was not published until 1978. Le Sueur's short stories, including those collected in Salute to Spring (1940), were widely admired. North Star Country (1945) is a saga about the people of the Midwest told in the form of an oral history, and Crusaders (1955) is a biography of her parents. In the late 1940s and the '50s, while under FBI surveillance because of her political views, she wrote children's books on American history and folklore. Her other works include the nonfiction Conquistadores (1973) and The Mound Builders (1974); Rites of Ancient Ripening (1975; poetry); Harvest: Collected Stories (1977); and Ripening: Selected Work, 1927–80 (1982).