Undated

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Badminton

• Gentofte BK wins the Europe Cup.
• 16 March – Morten Frost wins gold in men's singles at the 1986 All England Open Badminton Championships.

Cycling

• April – Kim Andersen wins Paris–Camembert.
• August – Jørgen Marcussen wins Trofeo Matteotti.
• Danny Clark (AUS) and Tony Doyle (GBR) win the Six Days of Copenhagen six-day track cycling race.
• Denmark wins one gold medal, one silver medal and one bronze medal at the 1986 UCI Track Cycling World Championships.

Equestrian sports

• Date unknown – Anne Grethe Jensen wins a gold medal at the World Dressage Championships in Cavan Monaghan, Canada.

January–March

• 16 January – Hans-Kristian Vittinghus, badminton player
• 9 February – Stina Lykke Borg, footballer
• 4 March – Amanda Collin, actress
• 12 March – Kasper Irming Andersen, handball player
• 15 March – Jannik Hansen, ice hockey player

April–July

• 14 April – Michael Færk Christensen, cyclist
• 16 April – Peter Regin, ice hockey player
• 18 April – Denice Klarskov, pornographic film actress
• 20 April – Jonas Aaen Jørgensen, racing cyclist

• 3 May – Mads Christiansen, handballer
• 6 May – Marie Bjerre, politician
• 12 May – Christinna Pedersen, badminton player^[2]
• 27 May – Lasse Schöne, footballer
• 11 June – Leon Jessen, footballer
• 20 July – Theresa Eslund, footballer

September–December

• 18 September – Tobias Mikkelsen, footballer
• 27 September – Olga Ravn, author
• 27 September – Natasha Thomas, singer and songwriter
• 15 October – Janni Arnth, footballer
• 5 November – Kasper Schmeichel, footballer
• 2 December – Ken Ilsø, footballer
• 18 December – Henrik Toft Hansen, handball player