This article is about the particular significance of the year 1931 to Wales and its people.

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 - Pedrog

Events

• 3 March - Bertrand Russell succeeds to his father's earldom.
• 14 April - A meteorite falls in Pontllynfi, near Caernarfon.
• The Welsh School of Medicine is founded at Cardiff.
• Nancy Astor addresses a meeting in Cardiff on the subject of recruiting women into the police.

Arts and literature

• Edward Tegla Davies becomes editor of Yr Efrydydd.

Awards

• National Eisteddfod of Wales (held in Bangor)

• National Eisteddfod of Wales: Chair - David James Jones
• National Eisteddfod of Wales: Crown - Albert Evans Jones

New books

• Eliot Crawshay-Williams - Night in the Hotel
• John Jenkins (Gwili) - Hanfod Duw a Pherson Crist
• Moelona - Beryl
• Bertrand Russell - The Scientific Outlook
• Jennie Thomas ? Llyfr Mawr y Plant (first appearance of Wil Cwac Cwac)

Music

Film

• Ray Milland appears in The Bachelor Father, Strangers May Kiss, Just a Gigolo, Son of India, Bought, Ambassador Bill, and Blonde Crazy.

Broadcasting

• The BBC's Daventry radio transmitter increases its Welsh language output from a monthly to a fortnightly "Welsh interest" programme and includes a regular religious service broadcast entirely in Welsh.

Sport

• Rugby Union
• Wales, under the captaincy of Jack Bassett, win the Five Nations Championship.
  • 7 February Wales beat Scotland 13–8 at the Cardiff Arms Park, Cardiff.

Births

• 22 March - Leslie Thomas, novelist
• 27 December - John Charles, footballer

Deaths

• 3 March - Frank Russell, 2nd Earl Russell
• 13 March - Vernon Hartshorn MP, miners' leader and politician
• 13 March - Edward Thomas John, politician
• 22 June - Sir Henry Reichel, academic
• 28 July - John Neale Dalton, chaplain and tutor to the British royal family, settled in South Wales
• 2 November - Arthur Cook, miners' leader
• 27 December - Alfred Perceval Graves, Irish author settled in Wales