George Finlayson (1790–1823), was a Scottish naturalist and traveller. He was called one of the best naturalists of his day, and was noted for his pioneering studies of the plants, animals, and people of southern Thailand and the Malay peninsula.
Finlayson was born at Thurso in 1790, was clerk to Dr. Somerville, chief of the army medical staff in Scotland, and afterwards to Dr. Farrel, chief of the army medical staff in Ceylon. He was then transferred to Bengal, and attached to the 8th Light Dragoons as assistant-surgeon in 1819. In 1821-2 he accompanied the Crawfurd trade mission to Siam (now Thailand) and Cochin China (now Viet Nam) as naturalist, returning with it to Calcutta in 1823. By this time his health was thoroughly broken, and he soon afterwards died.
The journal which he had kept during the mission was edited, with a prefatory note on the author, by Sir Stamford Raffles, F.R.S., and published in 1826 under the title The Mission to Siam and Hue, the capital of Cochin China, in the years 1821-2, from the Journal of the late George Finlayson, Esq., 
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