This article is about the particular significance of the year 1866 to Wales and its people.
Incumbents
- Lord Lieutenant of Anglesey â Henry Paget, 2nd Marquess of Anglesey
- Lord Lieutenant of Brecknockshire â George Pratt, 2nd Marquess Camden (until 8 August) Charles Morgan, 1st Baron Tredegar (from 27 September)
- Lord Lieutenant of Caernarvonshire â Sir Richard Williams-Bulkeley, 10th Baronet (until 14 September); Edward Douglas-Pennant, 1st Baron Penrhyn (from 14 September)
- Lord Lieutenant of Cardiganshire â Edward Pryse
- Lord Lieutenant of Carmarthenshire â John Campbell, 2nd Earl Cawdor
- Lord Lieutenant of Denbighshire â Robert Myddelton Biddulph
- Lord Lieutenant of Flintshire â Sir Stephen Glynne, 9th Baronet
- Lord Lieutenant of Glamorgan â Christopher Rice Mansel Talbot
- Lord Lieutenant of Merionethshire â Edward Lloyd-Mostyn, 2nd Baron Mostyn
- Lord Lieutenant of Monmouthshire â Benjamin Hall, 1st Baron Llanover
- Lord Lieutenant of Montgomeryshire â Sudeley Hanbury-Tracy, 3rd Baron Sudeley
- Lord Lieutenant of Pembrokeshire â William Edwardes, 3rd Baron Kensington
- Lord Lieutenant of Radnorshire â John Walsh, 1st Baron Ormathwaite
Events
Arts and literature
Awards
New books
English language
Welsh language
Music
Sport
Births
- 13 January â Frank Hill, Wales international rugby captain (died 1927)
- 21 January â Sir Owen Cox, politician and businessman in Australia (died 1932)
- 22 March â Willie Thomas, Wales international rugby captain (died 1921)
- 1 April â Sir William Henry Hoare Vincent, diplomat (died 1941)
- 18 April â Frederick Llewellyn-Jones, lawyer and politician (died 1941)
- 20 April â Sir John Milsom Rees, laryngologist (died 1952)
- 30 May â John Gruffydd Moelwyn Hughes, minister and poet (died 1944)
- 5 August â Sir Edward Anwyl, Celtic scholar (died 1914)
- 7 August â Charles Granville Bruce, mountaineer (died 1939)
- 13 August - William Finney, cricketer (died 1927)
- 24 August â Caesar Jenkyns, footballer (died 1941)
- 4 October â Robert Jones (Trebor Aled), poet (died 1917)
- 12 October â James Ramsay MacDonald, politician (died 1937)
- 4 November â Sir David William Evans, lawyer, public servant and Wales international rugby player, (died 1926)
- 5 November â Daniel Protheroe, conductor and choirmaster (died 1934)
- 14 November â Tom Morgan Wales international rugby player (died 1899)
- 24 November â Alexander Bland, Wales international rugby player (died 1947)
- 4 December â Dai Lewis (died 1943), rugby union forward who played international rugby for Wales
- 10 December â Stanley L. Wood, illustrator (died 1928
- 15 December â William Williams, Wales national rugby union player (died 1945)
- date unknown â David Delta Evans (Dewi Hiraddug), journalist, author, and Unitarian minister (died 1948)
Deaths
- 16 January â David Owen (Brutus), literary editor, 70
- 27 January â John Gibson, sculptor, 75
- 31 January â Owen Owen Roberts, physician, 73
- 29 March - , poet, 55
- 19 May â David Davis, Blaengwawr, industrialist, 69
- 31 August (approx) â Robert Jermain Thomas, missionary (murdered in Korea), 26
- October â Evan Bevan, humorous writer, 42/43
- 16 October â Angharad Llwyd, antiquary, 86
- 27 October â William Rowlands, minister and author active in the USA
- 30 October â George Lort Phillips, MP for Pembrokeshire, 55 (injuries from a fall)
- 1 December (in London) â George Everest, surveyor and geographer, 76
See also
References