1804 in Wales

This article is about the particular significance of the year 1804 to Wales and its people.

Incumbents

February 21 - The Cornishman Richard Trevithick's newly built "Penydarren" steam locomotive operates on the Merthyr Tramroad between the Penydarren Ironworks in Merthyr Tydfil and Abercynon, following several trials since February 13, the world's first locomotive to work on rails. As a result of this achievement, Samuel Homfray wins a 1000 guineas wager with Richard Crawshay as to which of them could first build a steam locomotive for use in their works.
March 7 - Inauguration of the British and Foreign Bible Society, largely at the instigation of Thomas Charles.
The Cambrian is the first newspaper published in Wales.

Edward Davies - Celtic Researches on the Origin, Traditions and Languages of the Ancient Britons
Richard Llwyd
*Gayton Wake, or Mary Dod
*Poems, Tales, Odes, Sonnets, Translations from the British
Benjamin Heath Malkin - The Scenery, Antiquities, and Biography of South Wales
Azariah Shadrach - Drws i'r Meddwl Segur
Hester Thrale - ''British Synonymy: or an attempt at regulating the choice of words in familiar conversation''

14 January - Sir Hugh Owen, educationist
20 January - John Jones (Idrisyn), clergyman and author
2 March - Henry Davies, journalist
5 March - John Davies (Siôn Gymro), minister and linguist
31 March - Rice Rees, clergyman and historian
12 April - George Wallace Jones, US senator and son of Welsh lawyer John Rice Jones
date unknown - Benjamin Price, first bishop of the "Free Church of England"