Sir George Buchanan, FRS (5 November 1831 – 5 May 1895) was an English physician, epidemiologist and civil servant.

In 1866 Buchanan was elected a fellow of the Royal College of Physicians of London, where he served as censor (1892–1894) and Lettsomian lecturer (1867).

In 1856 he was made first medical officer to St Giles, which held the highest death rate among London districts.

Based on his observations there he wrote several highly praised reports on the causes and prevention of infectious deceases, eventually becoming a national authority in the field.

Buchanan remained connected with the University College London throughout his whole life, being elected a fellow in 1864, and serving as a member of the council.

Asmar was the daughter of Edward Cator Seaton, a colleague of Buchanan and his predecessor as the Chief Medical Officer.

[2] Another daughter, Florence Buchanan, was a pioneering physiologist who made significant contributions to the understanding of muscle and cardiac physiology.

[5] Another daughter, Anna Maud Buchanan, was particularly well educated; she appears on the roll of University College London female students between 1879 and 1885, achieving a BA (1882) and MA (1885) in Classics.