1778 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 1778 in Great Britain Scotland Elsewhere

This article is about the particular significance of the year 1778 to Wales and its people.