1814 in Wales
- 1 January - The first weekly newspaper in Welsh is published, when Seren Gomer is founded by Joseph Harris (Gomer), a Baptist minister in Swansea.
- February - Anthony Bushby Bacon sells his mineral rights at Cyfarthfa to Richard Crawshay for £95,000.
- May - Caernarvon and Anglesey Hospital is founded.
- Summer solstice - Thomas Williams (Gwilym Morgannwg) declaims his poem "Heddwch" from the Logan Stone in the presence of the Gorsedd of Morgannwg, at the "second Assemblage"
- 10 September - The last recorded fatal duel in Wales is fought at Adpar, Newcastle Emlyn. Thomas Heslop of Jamaica is killed; a local landowner, Beynon, is found guilty and fined one shilling.
- Sydenham Edwards founds The Botanical Register.
- The Admiralty re-locates from Milford Haven to Paterchurch, resulting in the founding of Pembroke Dock.
- Lampeter is granted its town charter.
- Journalist and preacher Elijah Waring settles at Neath.
Arts and literature
- January - George Grant Francis, philanthropist (d. 1882)
- 29 January - Edward William Thomas, composer (d. 1892)
- 5 March - Joseph Edwards, sculptor (d. 1882)
- 16 June - Robert Davies (Cyndeyrn), composer (d. 1867)
- date unknown - Eliezer Pugh, philanthropist (d. 1903)
- 12 March - Evan Thomas (Ieuan Fardd Ddu), printer and translator, 80?
- 12 May - Thomas Coke, Methodist leader, 66
- 21 June - Sir Erasmus Gower, colonial governor, 71
- 26 September - Owen Jones, antiquary and founder of the Gwyneddigion Society, 73
- 5 October - Thomas Charles of Bala, Bible publishing pioneer, 58
- 16 November - John Stuart, 1st Marquess of Bute, 70