Thomas Beale (c. 1775–1841), was a Scottish naturalist, opium speculator and general merchant operating in the Far East during the 19th century.
He is first mentioned as one of the five unofficial foreign residents in Canton in 1796 as secretary to his older brother who was the Prussian consul. Thomas later became consul in his own right and served from 1798 until at least 1814. Both brothers were partners in the trading firm of Magniac & Co., which dealt in goods including opium, cotton and tea. The Prussian consulship eventually devolved upon Jardine, Matheson & Co. through Hollingworth Magniac, that firm's founder.
Along with brother Daniel and John Henry Cox, Thomas was a partner in the firm of Cox & Beale around the turn of the 19th century.
Known for his hospitality, Beale's mansion in Macao included a garden with 2,500 potted plants and an aviary that became a must-see for Western visitors to Macau. The 40 by 20 feet (12.2 by 6.1 m) aviary contained hundreds of rare birds from China, Europe, Southeast Asia, and South America. George Vachell, chaplain to the East India Company described a visit during which he saw about six hundred birds to his friend John Stevens Henslow, Professor of Botany at Cambridge University and mentor to Charles Darwin. When the missionary cum naturalist George Bennett stopped in Macau during his Pacific voyage, Beale's garden and aviary made such an impression that he devoted forty-five pages of his travelogue to describing their contents. The house was described by a contemporary as "one of the finest of the old Portuguese houses ... on a narrow street known as Beale's Lane". Of Beale's aviary, contemporary visitor William Wightman Wood wrote:
"...in particular I may mention the bird-of-paradise. A splendid living specimen is in the possession of Mr. Beale almost domesticated. It feeds from the hand of its amiable owner without fear, and appears capable of being rendered perfectly tame and familiar. This is perhaps the only specimen at present existing in confinement."
After offering opium futures as security for loans in a falling market and investing millions of dollars in illicit deals in Brazil, he ended up owing the East India Company some 800,000 dollars. In 1816, Thomas was declared insolvent in the "most sensational bankruptcy of the period".
Bankruptcy notwithstanding, Thomas' amiability made him Lady Elizabeth Napier's favourite  among the Europeans in Macau in 1834 and he later subscribed 20 pounds sterling for a memorial to her husband the late William John, Lord Napier, first Chief Superintendent of Trade at Canton, so appointed following the abolition of the East India Company's monopoly on Far Eastern trade.
- "Old Protestant Cemetery in Macau". Retrieved May 31, 2011.
- Ride, Lindsay; Ride, May; Mellor, Bernard (ed.) (1996). An East India company cemetery: Protestant burials in Macao. Hong Kong Univ Press. ISBN 978-962-209-384-3. p. 253
- Fan, Fa-ti (2004). British Naturalists in Qing China: Science, Empire, and Cultural Encounter. Cambridge, MA and London: Harvard University Press. pp. 44-45
- Wood, William Wightman (1830). Sketches of China: with illustrations from original drawings. Carey & Lea, Philadelphia. p.244
- Coates, Austin. Macao and the British, 1637-1842. China; OUP. ISBN 978-0-19-582782-8. pp. 140-141
- Cheong, W.E. (1997). The Hong merchants of Canton: Chinese merchants in Sino-Western trade. Routledge. ISBN 0-7007-0361-6. p. 269
- Napier, Priscilla (1995). Barbarian Eye. Brassey's. p.138, Lady Napier's letter, 19 August 1834
- Canton Register, Tuesday, February 25, 1835