Katharina Lohrenz Schellenberg (1870 – January 1, 1945) was an American Mennonite medical missionary of Russian birth.
Her parents were Abraham and Katharina Lohrenz Schellenberg, with whom she immigrated to the United States in 1879, settling in Kansas.
At nineteen, she made her first commitment to Christ, joining the Mennonite congregation in Buhler, Kansas.
[2] Schellenberg studied medicine at the Deaconess Hospital in Cleveland, an undertook further study at the Medical Institute of Homeopathic Medicine in Kansas City, Kansas; she was the first woman among North American Mennonites to become a doctor, and became the denomination's first medical missionary in India when she traveled to that country in 1907.
Early in her career she worked in various locations, from Hughestown as far south as the Tungabhadra River; the mission built a hospital at Nagarkurnool in 1912.