The 2005 Denmark Open in badminton was held in Aarhus, Denmark, from October 18 to October 23, 2005.
| Category | Winners | Runners-up | Score | |
|---|---|---|---|---|
| Women's singles |  Pi Hongyan | Xu Huaiwen | 7–11, 11–4, 11–5 | |
| Men's doubles | Chan Chong Ming & Koo Kien Keat | Lars Paaske & Jonas Rasmussen | 15–6, 15–7 | |
| Women's doubles |  Kumiko Ogura & Reiko Shiota | Gail Emms & Donna Kellogg | 15–6, 15–9 | |
| Mixed doubles | Thomas Laybourn & Kamilla Rytter Juhl | Lars Paaske & Helle Nielsen | 15–8, 15–9 |