Admiral Sir Hugh Sinclair | |
|---|---|
 Sinclair in a carriage in Tallinn | |
| Born | 18 August 1873 Southampton, Hampshire, England |
| Died | 4 November 1939 (aged 66) London, England |
| Occupation | Intelligence officer |
| Awards | KCB |
| Espionage activity | |
| Allegiance | United Kingdom  |
| Service branch | Secret Intelligence Service (SIS/MI6) |
| Service years | 1923–1939 |
| Rank | Chief of the Secret Intelligence Service |
Admiral Sir Hugh Francis Paget Sinclair, KCB (18 August 1873 – 4 November 1939), known as Quex Sinclair, was a British intelligence officer. He was Director of British Naval Intelligence between 1919 and 1921, and he subsequently helped to set up the Secret Intelligence Service (SIS, commonly MI6) and GCHQ.