| Sir Thomas Southorn | |
| Office: | Governor of the Gambia |
| Term Start: | 22 October 1936 |
| Term End: | 23 March 1942 |
| Predecessor: | Arthur Richards |
| Successor: | Hilary Blood |
| Office1: | Colonial Secretary of Hong Kong |
| Term Start1: | 1 May 1925 |
| Term End1: | 23 March 1936 |
| Governor1: | Cecil Clementi William Peel Andrew Caldecott |
| Predecessor1: | Claud Severn |
| Successor1: | Norman Lockhart Smith |
| Birth Date: | 4 August 1879 |
| Alma Mater: | Corpus Christi College, Oxford |
Sir Wilfrid Thomas Southorn (4 August 1879 – 15 March 1957) (Chinese Translated Name: 修頓, Old Translated Name:蕭敦), known as Tom, was a British colonial administrator, spending the large part of his career in Ceylon (now Sri Lanka) before serving as Colonial Secretary of Hong Kong, then Governor of The Gambia.
He was educated at Warwick School and Corpus Christi College, Oxford.[1]
He had joined the Ceylon Civil Service in 1903, and was appointed Additional Assistant Colonial Secretary in 1909, Principal Assistant Colonial Secretary in 1920, and Principal Collector of Customs and Chairman of the Post Commission in 1923.[1]
He was the Colonial Secretary of Hong Kong from 1925 to 1936 and served as Acting Administrator of the colony from February to March 1930 and from May to September 1935, and then in November the same year, at either end of the tenure of Sir William Peel as governor.[2] His official (summer) residence was Mountain Lodge.[3]
In 1936, he was made Governor of the Gambia, notably describing the colony as "a geographical and economic absurdity".[3] He left The Gambia in March 1942.[4]
In 1921 he married author Bella Sidney Woolf (1877–1960), whom he met through her (later) more famous brother Leonard Woolf, when the two men were colleagues in Ceylon. In 1904, then a humble 'Office Assistant', Southorn had met Leonard Woolf on his arrival in Ceylon from England.[5]
Southorn Playground in Wan Chai, Hong Kong was named for him in 1934, while he was Colonial Secretary. Also bearing his name are the associated Southorn Stadium and adjacent Southorn Centre.[2]