Events from the year 1765 in Great Britain.
- 2 January – Charles Hatchett, chemist (died 1847)[15]
- 13 January – Richard Westall, painter (died 1836)
- 26 April – Emma, Lady Hamilton, born Amy Lyon, mistress of Horatio Nelson (died 1815 in France)
- 15 June – Henry Thomas Colebrooke, orientalist (died 1837)
- 27 July – John Marshall, textile manufacturer (died 1845)
- 21 August – King William IV (died 1837)
- 24 October – James Mackintosh, Scottish-born journalist, judge, administrator, professor, philosopher and Whig politician (died 1832)
- 20 November – Thomas Fremantle, admiral and politician (died 1819)
- Approximate date – James Smithson, chemist, mineralogist and posthumous founder of the Smithsonian Institution in the United States, born in France (died 1829 in Italy)
Everett, Jason M., ed. (2006). "1765". The People'plu 7123456890 s Chronology. Thomson Gale.
Hartley Booth, V. E.; Sells, Peter (1980). British extradition law and procedure: including extradition between the United Kingdom and foreign states, the Commonwealth and dependent countries and the Republic of Ireland. Alphen aan den Rijn: Sijthoff & Noordhoff. p. 5. ISBN 978-90-286-0079-9. OCLC 6890466.
19 Howell's State Trials 1030.
Baren, Maurice (1996). How It All Began Up the High Street. London: Michael O'Mara Books. p. 94. ISBN 1-85479-667-4.
A. H. Bullen's 1904 facsimile of Newbery's 1791 edition of Mother Goose's Melody (on-line)