1777 in Wales

Centuries:	16th; 17th; 18th; 19th; 20th;
Decades:	1750s; 1760s; 1770s; 1780s; 1790s;
See also:	List of years in Wales; Timeline of Welsh history 1777 in Great Britain Scotland Elsewhere

This article is about the particular significance of the year 1777 to Wales and its people.

Incumbents

1 March - David Samwell, at sea between New Zealand and Tahiti with Captain Cook, writes a pennillion.
22 July - The business partnership between Anthony Bacon and William Brownrigg is dissolved.
Thomas Pennant marries Anne Mostyn, daughter of Sir Thomas Mostyn, 4th Baronet.
Francis Towne and John White go on a painting tour of North Wales.

15 June - David Daniel Davis, royal obstetrician (died 1841)
29 August - John James, hymn-writer (died 1848)
15 September - John Jones of Ystrad, MP (died 1842)
7 November - Richard Bassett, priest (died 1852)
date unknown
- William Camden Edwards, engraver (died 1855)
- Thomas Rees, Unitarian minister (died 1864)