1780 in Wales

Centuries:	16th; 17th; 18th; 19th; 20th;
Decades:	1760s; 1770s; 1780s; 1790s; 1800s;
See also:	List of years in Wales; 1780 in Great Britain Ireland Scotland

This article is about the particular significance of the year 1780 to Wales and its people.

Incumbents

January - Admiral Sir Thomas Foley plays an important role in the relief of Gibraltar.
1 July - Anthony Bacon acquires the lease of the Hirwaun ironworks.
26 August - Edward Williames Salusbury Vaughan succeeds to the Rûg estate.^[1]
29 September - Sir Watkin Lewes is elected Lord Mayor of London.
Thomas Parry Jones-Parry marries his cousin Margaret and acquires the Madryn estate.
The Ladies of Llangollen settle at Plas Newydd.
Richard Price devises the "Northampton Tables" for calculating actuarial valuation for assurance and pensions.
The development of Ebbw Vale Steelworks begins.

10 February - James Henry Cotton, Dean of Bangor (died 1862)
15 April - Angharad Llwyd, antiquary (died 1866)
14 May - Sir Thomas Frankland Lewis, politician (died 1855)
7 October - Wyndham Lewis, MP (died 1838)
date unknown
- Dic Aberdaron (Richard Robert Jones), traveller and linguist (died 1843)^[2]
- Thomas Prothero, lawyer and businessman (died 1853)^[3]

↑ Welsh Biography Online. Accessed 31 March 2016
↑ Humphreys, H. The Celebrated Cambrian Linguist, or the History of Dick Aberdaron (Carnarvon: H. Humphreys, 1866).
↑ Welsh Biography Online, Prothero, Thomas.