Ada Josephine Todd was an American author and educator born in Connecticut. She pursued an extensive education despite limited financial means, graduating from Claverack College before earning degrees from Syracuse University and Boston University. She held teaching positions in classical languages and the sciences at institutions in Ohio and Connecticut, including Xenia Female College and Bridgeport High School, where she introduced the laboratory method into public school science instruction. Todd combined her academic career with a strong interest in literature, publishing articles, translations, and a book titled The Vacation Club (1892), which explored topics in natural history, geology, and astronomy. She was active in literary and educational organizations, including the Association of American Authors, the Browning Society of Philadelphia, and the Collegiate Alumnae Association, where she served in leadership roles.