1803 in Wales

This article is about the particular significance of the year 1803 to Wales and its people.

Incumbents

26 June - First public assembly of the South Wales Unitarian Association.
Robert Saunderson of Liverpool settles at Bala and becomes official printer to the Calvinistic Methodist Society, working for Thomas Charles.
17 July - Thomas Burgess is consecrated Bishop of St David's.
September - A new company, the Union Iron World Company, is formed to run Rhymney ironworks, after Benjamin Hall takes it over.
date unknown
*Rhys Davies (Y Glun Bren) preaches from the mounting-block in front of the Black Lion Inn at Talybont in Cardiganshire, beginning Independent Methodist activity there.
*Pascoe Grenfell contracts to trade in copper in the Swansea area.
*Thomas Johnes sets up a private printing press to publish translations of French medieval chronicles.
*Dunraven Castle is built, near Southerndown.
*Benjamin Heath Malkin begins his travels in South Wales.
*Paeonia mascula is discovered growing on the island of Steep Holm - the only species of peony native to the British Isles.