Mary Eloise O'Donnell de Garmo (November 3, 1861 – September 24, 1953) was an American educator and clubwoman, active in Shreveport, St. Louis, and Corpus Christi, on subjects from eugenics and parenting to road improvement and war memorials.

She founded the Girls' Training School for Neglected Children in Shreveport, and was active in the National Congress of Mothers,[5] organizing and leading the Louisiana and Missouri state chapters.

[12] Several of her areas of interest intersected in the establishment of the Gold Star Highway designation, making better roads that also served as a memorial to the war's dead and their survivors.

[2] In Corpus Christi, she worked to found a county historical museum, and a memorial to World War I veterans and their mothers.

[13][14] Books by de Garmo included World's Baby Eugenic Almanac for Parents, Road Cadet Patrol and Junior Home Builders, Plan for Developing Country Child Welfare,[3] Biography of Mrs. Frank Augustus Tompkins (1945), and Pathfinders of Texas, 1836 – 1846 (1951).