Margaret "Peggy" Seelye Treuer was an American Ojibwe judge and lawyer. She was Minnesota's first female Native American lawyer, working as a federal magistrate and tribal court judge for the Bois Forte Band of Chippewa, the Red Lake Nation, and the Leech Lake Indian Reservation. A member of the Leech Lake Band of Ojibwe, she volunteered with the Native American Rights Fund and worked for the reestablishment of the Menominee Indian Reservation. She earned degrees from the law school of the Catholic University of America and St. Luke's School of Nursing. She received a Lifetime Achievement Award from the National Association of Women Judges.