• Monarch – Margrethe II^[1]
• Prime minister – Anker Jørgensen

• July 19 – July 3 — Denmark at the 1980 Summer Olympics in Moscow: 2 gold medals, 1 silver medal and 2 bronze medals.

Badminton edit

• 23 March – Lene Køppen wins gold in women's single at the 1980 All England Open Badminton Championships.
• 27 May – 1 June – Denmark wins four bronze medals at the 1980 IBF World Championships.
• 17–20 April — With two gold medals, two silver medals and three bronze medals, Denmark finishes as the best nation at the 7th European Badminton Championships in Groningen, Netherlands.
• Hvidovre BK wins silver at Europe Cup.

Cycling edit

• Albert Fritz (FRG) and Patrick Sercu (BEL) win the Six Days of Copenhagen six-day track cycling race.

January–February edit

• 1 January – Karina Jacobsgaard, tennis player
• 16 January – Lars Bak, bicycle racer
• 29 January – Peter Løvenkrands, footballer
• 1 February – Ellen Trane Nørby, politician
• 17 February – Eva Dyrberg, former tennis player
• 28 February – Christian Poulsen, football player

March–June edit

• 21 March – Marit Bjørgen, cross-country skier
• 28 March – Rasmus Seebach, singer
• 31 March – Martin Albrechtsen, footballer
• 5 April – Rasmus Quist Hansen, rower
• 12 April – Peter Plaugborg, actor
• 5 May – Martin Retov, football coach and former player
• 30 June – Morten Skoubo, footballer

July–September edit

• 11 July – Mathias Boe, badminton player
• 11 August – Jerry Lucena, Danish-Filipino footballer
• 17 August – Christian Keller, footballer
• 7 September – Rikke Skov, handball player
• 30 September – Jakob Michelsen, football manager

October–December edit

• 8 October – Kasper Bøgelund, footballer
• 23 October – Jesper Nøddesbo, handballer
• 25 October – Ditte Jensen, freestyle swimmer
• 28 October – Agnes Obel, musician
• 2 November – Thomas Bredahl, guitarist
• 13 November – Morten Messerschmidt, politician

• 18 April – Poul Kjærholm, furniture designer (born 1929)
• 3 September – Dirch Passer, actor (born 1926)
• 6 September – Gustav Weinreich, woodcarver and furniture maker (born 1886)
• 13 December – Svend Olsen, weightlifter (born 1908)

• 1980 in Danish television