This article is about the particular significance of the decade 1830–1839 to Wales and its people.

Events

• 1830
• 1831
• 1832
• 1833
• 1834
• 1835
• 1836
• 1837
• 1838
• 1839

Arts and literature

New books

• Charles James Apperley - The Chace, the Road, and the Turf (1837)
• Eliza Constantia Campbell - Tales about Wales (1837)
• John Evans (I. D. Ffraid) - Hanes yr Iddewon (1831)
• Y Fwyalchen (poetry anthology) (1835)
• Felicia Hemans - Songs of the Affections (1830)
• Benjamin Jones (PA Môn) - Athrawiaeth Bedydd (1830)
• Sir Samuel Rush Meyrick - Engraved Illustrations of Antient Arms and Armour, from the Collection at Goodrich Court (1830)
• Thomas Price (Carnhuanawc) - Hanes Cymru a Chenedl y Cymry o'r Cynoesoedd hyd at Farwolaeth Llywelyn ap Gruffydd, vol. 1 (1836)
• William Williams (Caledfryn) - Drych Barddonol (1839)

Music

• Thomas Griffiths (Tau Gimel) - Casgliad o Hymnau (1830)
• David James - Myfyrdawd (1833)

Births

• 1830
  • 23 January - Thomas Lloyd-Mostyn, politician (d. 1861)
  • 22 April - Sarah Emily Davies, educator (d. 1921)
  • May - Richard Davies (Tafolog), poet and critic (d. 1904)
  • 25 May - Robert Williams (Trebor Mai), poet (d. 1877)
• 1831
  • 20 December - William T. Davies, Governor of Pennsylvania (d. 1912)
• 1832
  • 5 January - Love Jones-Parry, politician and Patagonian settler (d. 1891)
  • 3 April - William Thomas (Islwyn), poet (d. 1878)
  • 25 September - John Ceiriog Hughes, poet (d. 1887)
• 1833
  • date unknown
    • Richard Davies (Mynyddog), poet (d. 1877)
    • James James, harpist and composer (d. 1902)
• 1834
  • 16 October - Pryce Pryce-Jones, mail order entrepreneur (d. 1920)
  • date unknown - William Thomas (Gwilym Marles), minister (d. 1879)
• 1836
  • 30 January - Lewis Jones, Patagonian settler (d. 1904)
  • 5 July - Evan Herber Evans, minister (d. 1896)
  • 30 September - George Douglas-Pennant, 2nd Baron Penrhyn, industrialist (d. 1907)
  • 6 October - Allen Raine, novelist (d. 1908)
  • 20 October - Daniel Owen, novelist (d. 1895)
  • date unknown - John Jones (Myrddin Fardd), poet (d. 1921)
• 1837
  • 5 August - William Lewis, 1st Baron Merthyr, industrialist (d. 1914)
  • 6 September - Henry Thomas Edwards, preacher (d. 1884)
  • 22 September - Thomas Charles Edwards, minister, writer and first principal of the University of Wales (d. 1900)
  • 26 December - Sir William Boyd Dawkins, geologist (d. 1929)
  • date unknown - William Bowen Rowlands, politician (d. 1906)
• 1838
  • date unknown - Charles Gresford Edmondes, clergyman and teacher (d. 1893)
• 1839
  • 7 March - Ludwig Mond, German-born industrialist (d. 1909)
  • 24 September - John Neale Dalton, royal chaplain and tutor (d. 1931)
  • date unknown - Sarah Jane Rees (Cranogwen), writer (d. 1916)

Deaths

• 1830
  • 26 June - King George IV of the United Kingdom, formerly the second longest-serving Prince of Wales (1762-1820)
• 1831
  • 7 January - Edward "Celtic" Davies, author, 74
  • 8 June - Sarah Siddons, actress (born 1755)
  • 13 August - Dic Penderyn, labourer (executed) (born 1808)
• 1834
  • 11 August - William Crawshay I, industrialist (b. 1764)
  • 2 September - David Charles, hymn-writer (b. 1762)
• 1835
  • 13 May - John Nash, architect (b. 1752)
  • 3 June - William Owen Pughe, grammarian and lexicographer (b. 1759)
  • date unknown - Robert Davies (Robin Ddu o'r Glyn), poet (b. 1769)
• 1836
  • 22 November - Peter Bailey Williams, antiquarian (b. 1763)
• 1837
  • 19 February - Thomas Burgess, Bishop of St David's, 80
• 1838
  • 14 March - Wyndham Lewis, MP, 57
  • 19 July - Christmas Evans, preacher (b. 1766)
  • 26 December - Ann Hatton, novelist (b. 1764)
• 1839
  • 16 May - Edward Clive, 1st Earl of Powis