1820s in Wales
| Other years in Wales |
| Other events of the decade |
This article is about the particular significance of the decade 1820 - 1829 to Wales and its people.
Incumbents
- Prince of Wales - George
- Princess of Wales - Caroline of Brunswick
Arts and literature
New books
- John Elias - Golygiad Ysgrythurol ar Gyfiawnhad Pechadur
- Felicia Hemans - The Forest Sanctuary
- Thomas Price - An Essay on the Physiognomy and Physiology of the Present Inhabitants of Britain
- David Richards - Cywydd y Dilyw
Music
- John Ellis - Eliot
- Edward Jones - Hen Ganiadau Cymru
- Peroriaeth Hyfryd
- Seren Gomer
Births
- 1820
- *21 May - Sir Thomas Lloyd, 1st Baronet, politician and landowner
- 1821
- *24 June - Guillermo Rawson, Argentinian politician
- *16 July - John Jones, preacher and writer
- 1822
- *2 March - Michael D. Jones, Patagonian settler
- 1823
- *8 January - Alfred Russel Wallace, biologist
- *March - Rowland Williams, poet and archdruid
- *23 November - Sir John Evans, archaeologist
- 1824
- *date unknown - John Basson Humffray, political reformer in Australia
- 1825
- *7 June - R. D. Blackmore, novelist
- 1826
- *13 January - Henry Matthews, 1st Viscount Llandaff
- *1 March - John Thomas, harpist
- *8 May - George Osborne Morgan, lawyer
- *11 May - David Charles Davies, Nonconformist leader
- 1827
- *27 October - Joseph Tudor Hughes, harp prodigy
- 1828
- *30 January - John David Jenkins, philanthropist
- 1829
- *27 January - Isaac Roberts, astronomer
Deaths
- 1820
- *29 January - King George III of the United Kingdom, Prince of Wales 1751-1760
- *16 June - Thomas Jones of Denbigh, Methodist preacher and writer
- *27 June - William Lort Mansel, bishop and academic
- *23 August - John Randles, harpist
- *28 August - Henry Mills, musician
- 1821
- *2 May - Hester Thrale, diarist
- *7 August - Caroline of Brunswick, former Princess of Wales, 53
- 1822
- *30 March - David Thomas, poet
- *date unknown - Stephen Kemble, actor, brother of Sarah Siddons
- 1823
- *26 February - John Philip Kemble, actor, brother of Sarah Siddons
- 1825
- *24 February - Thomas Bowdler, editor
- *9 June - Abraham Rees, encyclopaedist
- *10 August - Joseph Harris, Baptist minister, poet and editor
- 1827
- *date unknown - Helen Maria Williams, novelist and poet
- 1828
- *September - William Madocks, landowner
- 1829
- *26 January - Benjamin Millingchamp, collector of manuscripts
- *June - Elizabeth Randles, harpist