Events from the year 1855 in Denmark.

• Monarch – Frederick VII^[1]
• Prime minister – Peter Georg Bang

• 8 January – Sparekassen for Vordingborg og Omegn is established.^[2]

• 31 October – Gads Forlag is founded by Gottlieb Ernst Clausen Gad.
• 18 November – Sødring & Co. is founded by Christopher Hansen Sødring and Frederik Marchus, Count Knuth til Knuthenborg.
• 27 September – A vote in Folketinget concerning the so-called fællesforfatning.

• 17 January – Alfred Benzon, pharmacist (died 1922)
• 14 February – Christian Bohrm physician (died 1911)
• 20 February – Fanny Garde, ceramist and designer (died 1928)
• 22 March – Karl Madsen, art historian, painter and arts administrator (died 1938)

• 11 August – Erik Henningsen, painter (died 1839)

• 16 October – Carl Andreas Koefoed, agronomist (died 1948)
• 12 October – Charlotte Norrie, nurse and women's rights activist (died 1940)^[3]
• 20 October – Poul Simon Christiansen, painter and church decorator (died 1933)

• 7 March – Stephan Hegerm actor (born 1769)
• 11 November – Søren Kierkegaard, philosopher