1921 in Wales

Incumbents

• Prince of Wales - Edward, Prince of Wales, son of King George V of the United Kingdom
• Princess of Wales - vacant
• Archbishop of Wales - Alfred George Edwards
• Archdruid of the National Eisteddfod of Wales - Dyfed

Events

• January 26 - The Abermule train collision claims 17 lives, including that of Lord Herbert Vane-Tempest, youngest son of the Marquess of Londonderry.
• February - Ernest Evans becomes Liberal MP for Cardiganshire, winning the seat vacated by Matthew Vaughan-Davies, 1st Baron Ystwyth, on the latter's elevation to the peerage.
• April 1 - Alfred Mond becomes Minister of Health.
• December - Leslie Morris becomes a founder member of the Communist Party of Canada.
• December 23 - The Maid of Delos sinks off the coast of Dyfed, with 26 deaths.
• The Anglo-Persian Oil Company Limited begins work on the UK's first oil refinery at Llandarcy.
• Hugh Robert Jones founds the Byddin Ymreolaeth Cymru (“Home Rule Army”), which forms the basis for the development of Plaid Cymru.
• Cardiologist Thomas Lewis is knighted.
• John Bodvan Anwyl is appointed secretary of the Welsh......
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