1842 in Denmark
Events from the year 1842 in Denmark. Incumbents
 Monarch – Christian VIII
 Prime minister – Otto Joachim, Poul Christian Stemann

Events
 23 July – the Hørsholm Textile Factory is established in Hørsholm. Undated
 The National Liberal Party is formed. Jørgen Ernst Meyer establishes the nation's first lacquerware company. Births

JanuaryMarch
 4 February – Georg Brandes, critic and scholar (died 1927)
 27 February  Theodor Wessel, businessman (died 1905)
 2 March – Carl Jacobsen, brewer, industrialist and arts patron (died 1914)
 9 March  Vilhelm Groth, painter (died 1899)

AprilJune
 3 April   Niels Peter Bornholdt, businessman (died 1924)
 6 May  Emil Christian Hansen, chemist (died 1909)
 16 May  Gustav Adolph Hagemann, engineer and businessman (died 1916)

JulySeptember
 17 August – Hugo Egmont Hørring, politician, prime minister of Denmark (died 1909)
 22 August  Emilie Mundt, painter (died 1922)

OctoberDecember
 4 October  Carl Christoffer Georg Andræ, politician (died 1893)
 4 November  Otto Haslund, painter (died 1917)
 16 November – Hannibal Sehested, prime minister of Denmark (died 1924)

Deaths
 8 October – Christoph Ernst Friedrich Weyse, composer (born 1774)

References

 
1840s in Denmark
Denmark
Years of the 19th century in Denmark