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 |