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.