The following events occurred in Denmark in the year 1899.

• Monarch – Christian IX^[1]
• Prime minister – Hugo Egmont Hørring

• March – The annual Charlottenborg Spring Exhibition opens. Anna Ancher's A Vaccination has already prior to the opening of the exhibition been sold to a Swedish collector, a fact reported in several newspapers.^[2]
• 18 May – The Odsherred Railway opens.
• 4 June – KFUMs Boldklub København is founded.
• 21 July – The Danish Nurses' Organization is established.
• 5 September – The first labour and management agreement in Denmark is reached between the Danish Federation of Trade Unions and the Danish Employers' Confederation.^[3]
• 22 November – J. P. Suhr & Søn is dissolved.^[4]

• The Women's Council in Denmark is established.

• 13 January – Gudrun Stig Aagaard, textile artist (died 1986)
• 30 January – Anna Sofie Boesen Dreijer, textile artist (died 1986)
• 2 March – Harald Agersnap, composer, educator and musician (died 1982)
• 10 March – Finn Høffding, composer (died 1997)
• 11 March – Frederik IX, King of Denmark (died 1972)^[5]
• 19 March – Aksel Sandemose, author (died 1965)

• 30 April – Olaf Wieghorst, painter (died 1988)

• 27 July – Carl Johan Hviid, actor (died 1964)
• 2 September – Hans Jacob Nielsen, boxer (died 1967)
• 7 September – Hans Bjerrum, hockey player and businessman (died 1979)

• 9 October – Thorkil Kristensen, politician (died 1989)

• 22 March – Anna Henriette Levinsohn, opera singer (born 1839)
• 17 August – Erik Bøgh, journalist, playwright and songwriter (born 1822)
• 14 September – Vilhelm Groth, painter (born 1842)
• 21 October – Edvard Jünger, precision mechanic (born 1823)
• 18 November – Hans Peter Hansen, xylographer (born 1829)
• 29 December – Vilhelm Christesen, silver smith (born 1822)