1845 in Wales

Centuries:	17th; 18th; 19th; 20th; 21st;
Decades:	1820s; 1830s; 1840s; 1850s; 1860s;
See also:	List of years in Wales; 1845 in The United Kingdom Ireland Scotland

This article is about the particular significance of the year 1845 to Wales and its people.

Incumbents

1 March — Robert Stephenson begins construction of the Chester and Holyhead Railway.
2 August — 26 men are killed in a mining accident at Cwmbach, Aberdare.
Halkyn-born Mormon missionary Dan Jones returns to Wales from the United States to proselytise for The Church of Jesus Christ of Latter-day Saints.^[1]
Thomas Gee inherits his father's printing business.
Henry Hussey Vivian becomes manager of the Hafod Smelting Works.
Thomas Brigstocke exhibits his painting of General Nott before Queen Victoria.
Penry Williams paints the portrait of Lady Charlotte Guest.
Lewis Edwards founds the periodical Y Traethodydd.
The Welsh language periodical Y Trysorfa is founded.

Daniel Evans (Daniel Ddu o Geredigion) — Galar-Cerdd ar Farwolaeth William Bruce Knight, Deon Llandaf
John Jones (Idrisyn) — Yr Esboniad Beirniadol
John Mills (Ieuan Glan Alarch) — Y Beirniadur Cymreig
Samuel Prideaux Tregelles — Hebrew Reading Lessons

1 January – Francis Jayne, Principal of St David's College, Lampeter, and Bishop of Chester (died 1921)
24 February – Alfred Lewis Jones, shipping magnate (died 1909)
16 May – Amy Dillwyn, businesswoman and novelist (died 1935)
21 June – Samuel Griffith, Premier of Queensland (died 1920)
10 October – Timothy Richard, missionary (died 1919)