1878 in Denmark
Events from the year 1878 in Denmark. Incumbents
 Monarch – Christian IX
 Prime minister – J. B. S. Estrup

Events

 39 July  The 11th Scandinavian Scientist Conference is held in Copenhagen. 9 May  The panserbatteri Helgoland is launched. 21 December  Princess Thyra of Denmark is wed to Ernest Augustus, Crown Prince of Hanover in Copenhagen. The couple continue to Fredensborg Palace after the wedding ceremony. Births

JanuaryMarch
 13 March – Lau Lauritzen Sr., film director, screenwriter and actor (died 1938)
 11 April – Holger-Madsen, actor (died 1943)
 17 March  Gudmund Nyeland Brandt, landscape architect (died 1945)

JulySeptember
 30 July  Jørgen Skafte Rasmussen, businessman, company founder (died 1964)
 2 August – Princess Ingeborg of Denmark, duchess of Västergötland (died 1958 in Sweden)
 26 September  Holger Thiele, astronomer (died 1946)

OctoberDecember
 9 November  Povl Baumann, architect (died 1963)
 24 December – Thomas Madsen-Mygdal, politician, former Danish prime minister (died 1943)

Deaths
 6 March  Harald Jerichau, painter (born 1851)
 4 December   David B. Adler, businessman (born 1826)

References

 
1870s in Denmark
Denmark
Years of the 19th century in Denmark