• Monarch – Christian X^[1]
• Prime minister – Niels Neergaard

• 21–23 June – The foundation stone for the Dante Column on Danttes Plads in Copenhagen is set.

Undated edit

• KB wins their fifth Danish football championship by defeating B 1901 4–2 in the final of the 1921–22 Danish National Football Tournament.

January–March edit

• 9 March – Count Flemming of Rosenborg (died 2002 in France)

April–June edit

• 12 April – Erik Ninn-Hansen, politician (died 2014)
• 19 April – Poul Andersen, resistance member (died 2006)
• 12 June – Leif Thybo, composer (died 2001)
• 17 June – Lisbet Dæhlin, ceramist (died 2012)
• 19 June – Aage Bohr, nuclear physicist and Nobel Prize laureate (died 2009)

July–September edit

• 3 July
  • Viggo Rivad, photographer (died 2016)
  • Anker Jørgensen, politician, prime minister of Denmark (died 2016)

October–December edit

• 19 December – Niels Holst-Sørensen, athlete and airforce officer (died 2023)
• 20 December – Svend Wiig Hansen, sculptor and painter (died 1997)

January–March edit

• 22 January – Fredrik Bajer, writer (born 1837)
• 9 February – Harald Krenchel, fencer (born 1884)
• 24 March – Johanne Christine Petersen, school principal (born 1847)^[2]

April–June edit

• 14 April – Johannes Emil Gnudtzmann, architect (born 1837)
• 9 May – Charlotte Eilersgaard, author and editor (born 1858)^[3]
• 21 May – Alfred Benzon, pharmacist and industrialist (born 1855)

July–September edit

• 4 September – Frederik Jacobsen, actor (born 1876)
• 19 September – Philip Schou, businessman (born 1838)
• 22 September – Ida Falbe-Hansen, educator and women's activist (born 1849)

October–December edit

• 25 October – Emilie Mundt, painter (born 1842)
• 4 December – Hermann Baagøe Storck, architect (born 1839)