Lepha Eliza Bailey (January 21, 1845 − May 1, 1924) was an American author, lecturer, and social reformer. Her girlhood was passed in Wisconsin when that part of the country was a wilderness. Afterwards, she became a lecturer of national repute upon temperance and woman's suffrage. In 1880, she was invited to speak under the auspices of the National Prohibition Alliance. She responded and continued to work in the eastern part of the United States until that society disbanded, and finally merged with the Prohibition Party, under whose auspices she worked for years over the temperance movement.