Thomas Spencer Cobbold FRS (26 May 1828 – 10 March 1886) was an English biologist.

Richard Cobbold, author of the History of Margaret Catchpole.

[3] After graduating in medicine at the University of Edinburgh in 1851, he was appointed lecturer on botany at St Mary's Hospital, London in 1857, and also on zoology and comparative anatomy at Middlesex Hospital in 1861.

[2] From 1868 he acted as Swiney Lecturer on geology at the British Museum until 1873, when he became professor of botany at the Royal Veterinary College, afterwards filling a chair of helminthology which was specially created for him at that institution.

His special subject was helminthology, particularly the worms parasitic in man and animals, and as a physician he gained a considerable reputation in the diagnosis of cases depending on the presence of such organisms.