1787 in Wales

Centuries:	16th; 17th; 18th; 19th; 20th;
Decades:	1760s; 1770s; 1780s; 1790s; 1800s;
See also:	List of years in Wales; Timeline of Welsh history 1787 in Great Britain Scotland Elsewhere

This article is about the particular significance of the year 1787 to Wales and its people.

Incumbents

March - Hester Piozzi returns from Italy with her second husband.
December - Evan Evans (Ieuan Fardd), shortly before his death, sells his manuscript collection.
Thomas Charles opens his first Sunday school.
The first Cymmrodorion Society is disbanded.
Iolo Morganwg is a prisoner in Cardiff jail.
Margam orangery built.