Catherine Hamlin

Elinor Catherine Hamlin, AC, FRCS, FRANZCOG, FRCOG (née Nicholson; 24 January 1924 – 18 March 2020) was an Australian obstetrician and gynaecologist who, with her husband, New Zealander Reginald Hamlin, co-founded the Addis Ababa Fistula Hospital, the world's only medical centre dedicated exclusively to providing free obstetric fistula repair surgery to poor women with childbirth injuries. They also co-founded an associated non-profit organisation, Hamlin Fistula Ethiopia.

Hamlin was recognised by the United Nations agency UNFPA as a pioneer in fistula surgery for her development of techniques and procedures for obstetric fistula treatment. The Hamlins, together with the hospital staff, have treated more than 60,000 women to date for obstetric fistula. She died in Addis Ababa on 18 March 2020.