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The 1990 Denmark Open in badminton was a three-star tournament held in Aabenraa, from October 24 to October 28, 1990.
| Category | Winners | Runners-up | Score |
|---|---|---|---|
| Men's singles |  Poul-Erik Høyer Larsen | Morten Frost Hansen | 4–15, 15–10, 17–14 |
| Women's singles |  Tang Jiuhong | Zhou Lei | 11–3, 11–2 |
| Men's doubles | Li Yongbo & Tian Bingyi | Jesper Knudsen & Thomas Stuer-Lauridsen | 15–8, 15–6 |
| Women's doubles | Lotte Olsen & Dorte Kjær |  Gillian Gowers & Gillian Clark | 15–13, 9–15, 15–11 |
| Mixed doubles | Thomas Lund & Pernille Dupont | Henrik Svarrer & Marlene Thomsen | 15–4, 15–10 |