William Richard Cortis (c. 1847 – 5 January 1909) was an English-born medical practitioner and politician in New South Wales, Australia.
He was born in Yorkshire and attended King's College School and Guy's Hospital, where he studied medicine and qualified in 1861.
In 1868 he became house surgeon at Guy's Hospital, and he later worked at Bedlam and Colney Hatch asylums.
He returned to England and tried again in 1871, living first at Hill End before settling in Bathurst, where he worked at the hospital.
[3] Cortis served as a captain in the second contingent of the New South Wales Army Medical Corps in the Boer War, participating in operations in Orange Free State (including actions at Poplar Grove, Driefontein, Karee Siding, Vet River, Zand River, Bethlehem and Bothaville) and in the Transvaal (including actions at Johannesburg, Pretoria, Diamond Hill and Belfast).