1884 in Denmark
Events from the year 1884 in Denmark.

Incumbents
 Monarch – Christian IX
 Prime minister – J. B. S. Estrup

Events

 31 May – The Tommerup–Assens railway line opens on Funen.
 25 June – The 1884Danish Folketing election takes place.
 10–16 August – The 8th International Medical Congress opens in Copenhagen. The participants include Peter Ludvig Panum (President), Louis Pasteur, Rudolf Ludwig Virchow and James Paget.
 3 October – The fire of the 2nd Christiansborg Palace begins.

Births
 9 April – Peter Andersen, gymnast (died 1954)
 18 March Oluf Høst, painter (died 1966)
 28 May – Harald Krenchel, fencer (died 1922)
 30 June – Svend Rindomm screenwriter and actor (died 1960)
 30 September – Carl Pedersen, rower (died 1968)

Deaths
 9 August - Annestine Beyer, reform pedagogue and pioneer on women's education (born 1795)