Lillian Resler Harford (née , Resler; May 15, 1851 – 1935) was an American church organizer, editor, and author. She was an active worker in the Woman's Missionary Association of her church, the United Brethren in Christ, and delivered lectures for the Women's Missionary Society. In 1880, she was one of the two delegates sent by the Association to the World's Missionary Conference in London She became the longest-serving president of the Association. Harford died in 1935.