← 1820 1819 1818 1821 in Denmark → 1822 1823 1824
Decades:	1800s 1810s 1820s 1830s 1840s
See also:	Other events of 1821 List of years in Denmark

Events from the year 1821 in Denmark.

Incumbents

• Monarch – Frederick VI^[1]

Events

Undated

Culture

Art

• 21 May – The so-called Copenhagen Mythological Competition is announced via advertisements in several Copenhagen newspapers.^[2]

Births

• 9 June – Arent Nicolai Dragstedm goldsmith (died 1898)
• 31 July – William Hammer, painter (died 1889)
• 19 October – Axel Kittendorff, lithographer (died 1868)
• 23 November – Heinrich Hansen, painter (died 1890)

Deaths

• 2 April – Ulrich Wilhelm de Roepstorff, colonial administrator (died 1729)
• 22 July – Jørgen Balthazar Winterfeldt, naval officer and philanthropist (born 1732)