Events from the year 1863 in the United Kingdom.
- 17 January – David Lloyd George, Prime Minister (died 1945)
- 11 March – Andrew Stoddart, sportsman (died 1915)
- 17 March - Olivia Shakespear, novelist, playwright and patron of the arts (died 1938)
- 27 March – Henry Royce, automobile pioneer (died 1933)
- 5 April – Princess Victoria of Hesse and by Rhine, member of the Royal Family (died 1950)
- 18 April – Linton Hope, Olympic yachtsman and yacht and aircraft designer (died 1920)
- 15 May – Frank Hornby, inventor, businessman and politician (died 1936)
- 17 May – Charles Robert Ashbee, designer (died 1942)
- 27 May – Arthur Mold, cricketer (died 1921)
- 13 June – Lucy, Lady Duff-Gordon, fashion designer (died 1942)
- 19 June – John Goodall, footballer (died 1942)
- 6 July – Reginald McKenna, Chancellor of the Exchequer 1915–1916 (died 1943)
- 21 July – C. Aubrey Smith, actor and cricketer (died 1948 in Beverly Hills)
- 13 September – Arthur Henderson, politician, recipient of the Nobel Peace Prize (died 1935)
- 16 October – Austen Chamberlain, statesman, recipient of the Nobel Peace Prize (died 1937)
- 17 December – Violet Bland, suffragette (died 1940)
- 20 December – Margaret Greville, née Anderson, society hostess and philanthropist (died 1942)
- 6 January – Harriet Gouldsmith, landscape painter and etcher (born 1787)
- 9 March – John Gully, sportsman and politician (born 1783)
- 13 April – Sir George Cornewall Lewis, statesman (born 1806)
- 14 August – Colin Campbell, 1st Baron Clyde, soldier (born 1792)
- 24 June – Sir George Elliot, admiral (born 1784)
- 17 September – Charles Robert Cockerell, architect, archaeologist and writer (born 1788)
- 26 September – Frederick William Faber, poet, hymnodist, theologian and Catholic convert (born 1814)
- 6 October – Frances Milton Trollope, novelist and writer (born 1779)
- 8 October – Richard Whately, theologian and archbishop (born 1787)
- 28 October – William Cubitt, building and civil engineering contractor and politician (born 1791)
- 24 December – William Makepeace Thackeray, novelist (born 1811)
- 29 December – Joseph John Scoles, Catholic architect (born 1798)
Everett, Jason M., ed. (2006). "1863". The People's Chronology. Thomson Gale.
Ransom, P. J. G. (1996). Narrow Gauge Steam: its origins and world-wide development. Sparkford: Oxford Publishing Co. ISBN 0-86093-533-7.
"The Great Fight, This Day". The Standard. London. 10 December 1863. p. 5.
2 Hurl. & Colt. 722, 159 Eng. Rep. 299, 1863.
Palmer, Alan; Palmer, Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 283–284. ISBN 0-7126-5616-2.
Leavis, Q. D. (1965). Fiction and the Reading Public (2nd ed.). London: Chatto & Windus.