- Source: 1921 in Denmark
- Philip, Adipati Edinburgh
- Ingeborg Brams
- Perjanjian Denmark–Korea 1902
- Viggo Larsen
- Permasalahan Schleswig-Holstein
- Olav V dari Norwegia
- Bahasa Inggris
- Pangeran Andrew dari Yunani dan Denmark
- Alexandrine dari Mecklenburg-Schwerin
- Manchester United F.C.
- 1921 in Denmark
- Religion in Denmark
- Lyngby Boldklub
- 1921 Danish local elections
- 1921
- 1921–22 Danish National Football Tournament
- Picatinny Arsenal
- House of Oldenburg
- Demographics of Denmark
- 1921 in film
Events from the year 1921 in Denmark.
Incumbents
Monarch – Christian X
Prime minister – Niels Neergaard
Events
May – The departure of the 5yh Thule Expedition.
Sports
30 March – Lyngby Boldklub is founded.
21 August – Gentofte-Vangede Idrætsforening is founded.
= Cycling
=30 July – 8 August – The 1921 UCI Track Cycling World Championships are held in Copenhagen.
Henry Brask Andersen wins gold, Erik Kjeldsen wins silver and Johan Normann wins bronze in men's sprint at the Amateur event.
4 August – The 1921 UCI Road World Championships are held in Copenhagen
Willum Nielsen wins silver in Men's amateur road race.
= Football
=AB wins its second Danish football championship by defeating Aarhus Gymnastikforening 3–0 in the final of the 1920–21 Danish National Football Tournament.
Births
= January–March
=14 March – Lis Hartel, equestrian athlete (died 2009)
16 March – Jens Bjerre, Danish author, filmmaker and explorer (died 2020)
= April–June
=28 May – Kay Werner Nielsen, cyclist (died 2014)
29 May – Karen Hoff, canoeist (died 2000)
11 June – Ib Spang Olsen, artist and illustrator (died 2012)
= July–September
=1 September – Simon Spies, businessman, billionaire (died 1984)
= October–December
=21 November – Margrethe Schanne, ballerina (died 2014)
27 November – Ole Sarvig, poet (died 1991)
Deaths
= January–March
=2 February – Antonio Jacobsen, painter (born 1850)
12 February – Troels Frederik Lund, historian (born 1840)
= April–June
=18 May – Martin Nyrop, architect (born 1849)
= July–September
=8 September – Ingeborg Raunkiær, author (born 1863)
21 September – Edouard Suenson, business executive (born 1842)
= October–December
=8 October
Henning Frederik Feilberg, pastor, author and folklorist (born 1831)
Emma Eleonore Meyer, painter (born 1859)