Julia S. C. Warner (b. Chapman) (1833-1919) was born in Westfield, Massachusetts, and died in Evanston, Illinois. She married John H. Warner, an insurance adjuster, sometime after 1860, and by 1870 they were living in Sewickley, Pennsylvania. By 1880 they had moved to Milwaukee, Wisconsin. Along with her twin sister Emily S. C. Finch (b. Chapman), Warner became interested in Christian Science in the mid-1880s. They studied Christian Science with Jesse G. N. Clarke, a student of Mary Baker Eddy, and taught at the Milwaukee Christian Science Institute, where Warner also served as secretary. Warner also studied Christian Science with Silas J. Sawyer and was a member of his students association until she left it in July 1887. Along with their daughters Emily Swift Finch and Louise B. Warner, the twins joined The First Church of Christ, Scientist, in Boston, Massachusetts, on July 4, 1896. Warner's sons Lansing B. Warner and Martyn Finch Warner, who were also Clarke's students, later joined on June 4, 1898. The family were also members of a Christian Science branch church in Milwaukee. By 1904 Warner was living with her daughter and niece in Bridgeport, Connecticut, and she relocated to New Harbor, Maine, in 1911. By the time of her death she was living with family in Evanston. Warner was listed in the directory of The Christian Science Journal as a Christian Science practitioner in Milwaukee from 1897 to 1903 and in Bridgeport from 1904 to 1910.

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