1820 in Denmark

Events from the year 1820 in Denmark.

Incumbents

 * Monarch – Frederick VI

Events

 * 1 May – Sparekassen for Kjøbenhavn og Omegn is established in Copenhagen.

Undated
 * Bella and Hanna. The Eldest Daughters of M. L. Nathanson is painted by Christoffer Wilhelm Eckersberg

January–March

 * 28 January – Vilhelm Pedersen, artist, illustrator (died 1859)

October–December

 * 2 October – Georg Petersen, businessman (died 1900)
 * 25 October – Lorenz Frølich, painter (died 1908)
 * 26 November
 * Prince Frederick William of Hesse-Kassel (died 1884 in Germany)
 * Johan Adam Schwartz, turner (died 1874)

January–March

 * 1 March – Peter Christian Uldahl, piano maker (born 1779)

April–June

 * 13 April – Johan Ludvig Mansa, landscape architect (born 1740 in Zweibrücken)
 * 27 May – Jean-Françoìs de Dompierre de Jonquières, merchant, landowner and amateur artist (born 1775)

July–September

 * 30 July – Carl Adolph Castenschiold, landowner and chamberlain (born 1740)

October–December

 * 26 December – Frederik Ludvig Bang, physician (born 1747)