Sir Cuthbert Sidney Wallace, 1st Baronet (20 June 1867 – 24 May 1944) was a British surgeon. He was born in Surbiton, Surrey, the youngest son of the Rev. John Wallace and educated at Winchester House School, Haileybury College, 1881–86, and St Thomas's Hospital, London. After the war he again returned to St Thomas's to serve as senior surgeon and director of the surgical unit for several years, before being elected consultant surgeon and dean of the medical school. He was also dean of the Medical Faculty of the University of London.