• Monarch – Christian X^[1]
• Prime minister – Thorvald Stauning

Date unknown edit

• B93 wins their fourth Danish football championship by winning the 1929–30 Danish Championship League.

• 9 January – Kate Mundt, actress (died 2004)
• 30 March – Preben Kaas, actor (died 1981)
• 17 September – Hardy Rafn, actor (died 1997)
• 4 November – John Hahn-Petersen, actor (died 2006)
• 19 November – Kurt Nielsen, tennis player (died 2011)

January–March edit

• 24 February – Hans Ole Brasen, painter (born 1849)
• 28 February – Rasmus Andersen, sculptor (born 1861)

April–June edit

• 22 April – Jeppe Aakjær, writer (born 1866)
• 10 May – Christian Mølsted, painter (born 1862)
• 20 June – Kristian Erslev, historian (born 1852)

October–December edit

• 6 October – Hans Christian Viggo-Hansen, painter, sculptor and artisan metalsmith (born 1859)
• 2 November – Viggo Jensen, weightlifter, shooter, gymnast and athlete, Olympic gold medalist (Denmark's first) at the 1896 Summer Olympics (born 1874)
• 28 November – Erik Henningsen, painter (born 1855)
• 1 December – Peder Vilhelm Jensen-Klint, architect (born 1853)
• 19 December – Jens Christian Christensen, politician, prime minister of Denmark (born 1856)
• 21 December – Malthe Engelsted, painter (born 1852)
• 29 December – Albert Edvard Wang , painter (born 1864 )