1811 in Wales

This article is about the particular significance of the year 1811 to Wales and its people.

Incumbents

5 February - The Prince of Wales becomes Prince Regent.
25 March - Sir Joseph Bailey takes over Nantyglo Ironworks.
25 May - The Hay Railway is authorised by an Act of Parliament.
19 June - The first Methodist Association for the ordination of new ministers is held at Llandeilo. Thomas Charles plays a leading role. The Presbyterian Church of Wales thus secedes from the Church of England.
20 August - Thomas Sheasby resigns as engineer of the Aberdare Canal, to be replaced by George Overton. As part of the canal works, a free-standing metal rail bridge is built at Robertstown, Aberdare - the first of its kind in the world.
17 September - Completion of The Cob embankment across Traeth Mawr by William Madocks is celebrated. His nearby model town of Tremadog is also completed by this year.
date unknown
At Hereford Assizes, Samuel Homfray and his partners in the Penydarren ironworks sue the Dowlais Company for fouling the Morlais brook with cinders and slag.
Pont-y-gwaith is built over the River Taff near Merthyr Tydfil.

14 January - Rowland Prichard, musician (d. 1887)
26 January - Roger Edwards, minister (d. 1886)
11 March - Thomas Jones (Glan Alun), poet (d. 1866)
12 March - Mary Pendrill Llewelyn, translator and writer (died 1874)
7 April - John Williams (Ab Ithel), antiquary (d. 1862)
29 May - Charles Meredith, pioneer grazier and politician in Tasmania (died 1880 in Australia)
25 June - Jane Hughes, poet (died 1880)
11 July - William Robert Grove, inventor (d. 1896)
date unknown - John Jones (Shoni Sguborfawr), Rebecca rioter (died 1858)