1821 in Wales

This article is about the particular significance of the year 1821 to Wales and its people.

Incumbents

 * Lord Lieutenant of Anglesey – Henry Paget, 1st Marquess of Anglesey
 * Lord Lieutenant of Brecknockshire and Monmouthshire – Henry Somerset, 6th Duke of Beaufort
 * Lord Lieutenant of Caernarvonshire – Thomas Bulkeley, 7th Viscount Bulkeley
 * Lord Lieutenant of Cardiganshire – William Edward Powell
 * Lord Lieutenant of Carmarthenshire – George Rice, 3rd Baron Dynevor
 * Lord Lieutenant of Denbighshire – Sir Watkin Williams-Wynn, 5th Baronet
 * Lord Lieutenant of Flintshire – Robert Grosvenor, 1st Marquess of Westminster
 * Lord Lieutenant of Glamorgan – John Crichton-Stuart, 2nd Marquess of Bute
 * Lord Lieutenant of Merionethshire – Sir Watkin Williams-Wynn, 5th Baronet
 * Lord Lieutenant of Montgomeryshire – Edward Clive, 1st Earl of Powis
 * Lord Lieutenant of Pembrokeshire – Richard Philipps, 1st Baron Milford
 * Lord Lieutenant of Radnorshire – George Rodney, 3rd Baron Rodney


 * Bishop of Bangor – Henry Majendie
 * Bishop of Llandaff – William Van Mildert
 * Bishop of St Asaph – John Luxmoore
 * Bishop of St Davids – Thomas Burgess

Events

 * 27 July – Sir Thomas Phillipps is created a baronet.
 * 13 September – King George IV of the United Kingdom visits Brecon on his return from Ireland.
 * November – The first edition of Y Dysgedydd appears.
 * 1 March – The first gas street lighting in Wales is installed at Swansea.
 * unknown date – William Madocks obtains an Act of Parliament allowing him to build a port, later known as Porthmadog.

New books

 * John Elias – Golygiad Ysgrythurol ar Gyfiawnhad Pechadur
 * Evan Evans (Ieuan Glan Geirionydd) – Pedwar Cyflwr Dyn (translation of a work by Thomas Boston
 * David Richards (Dafydd Ionawr) – Cywydd y Dilyw

Music

 * Joseph Harris (Gomer) – Casgliad o Hymnau (collection of hymns)

Births

 * 21 April – Thomas Stephens, historian, literary critic and social reformer (d. 1875)
 * 1 May – William Latham Bevan, church historian (d. 1908)
 * 24 June – Guillermo Rawson, Argentinian politician (d. 1890)
 * 6 July – Henry Hussey Vivian, 1st Baron Swansea (d. 1894)
 * 16 July – John Jones (Mathetes), preacher and writer (d. 1878)
 * 14 November – John Owen (Owain Alaw), musician (d. 1883)
 * 16 December - John Griffith, journalist writing under the pseudonym Y Gohebydd (d. 1877)
 * date unknown - William Davies, politician (d. 1895)

Deaths

 * 16 February – Hugh Davies, botanist, 81
 * 2 March - Benjamin Evans, Independent minister, 81
 * 2 May – Hester Thrale, diarist, 80
 * 21 May – John Jones (Jac Glan-y-gors), poet and satirist, 54
 * 13 July – Sir Watkin Lewes, lord mayor of London, 81
 * 7 August – Caroline of Brunswick, former Princess of Wales (1795–1820), 53
 * 12 October - William Jones, evangelist, 65
 * November – Richard Fenton, poet and author, 74