1820 in Wales

Centuries:	17th; 18th; 19th; 20th; 21st;
Decades:	1800s; 1810s; 1820s; 1830s; 1840s;
See also:	List of years in Wales; Timeline of Welsh history 1820 in The United Kingdom Scotland Elsewhere

This article is about the particular significance of the year 1820 to Wales and its people.