| Dates: | 11–15 December |
| Number Edition: | 9 |
| Prize Money: | 176050 |
| Location: | Kuala Lumpur, Malaysia |
| Previous: | 1990 |
| Next: | 1992 |
The 1991 World Badminton Grand Prix was the ninth edition of the World Badminton Grand Prix finals. It was held in Kuala Lumpur, Malaysia, from December 11 to December 15, 1991.
| Category | Winners | Runners-up | Score | |
|---|---|---|---|---|
| Men's singles |  Zhao Jianhua | Wu Wenkai | 15–4, 12–15, 15–12 | |
| Women's singles | Susi Susanti |  Lee Heung-soon | 9–11, 11–8, 11–1 | |
| Men's doubles | Jalani Sidek & Razif Sidek | Huang Zhanzhong & Zheng Yumin | 15–10, 12–15, 18–14 | |
| Women's doubles | Chung So-young & Hwang Hye-young | Erma Sulistianingsih & Rosiana Tendean | 18–15, 15–3 | |
| Mixed doubles | Thomas Lund & Pernille Dupont | Shon Jin-hwan & Gil Young-ah | 11–15, 15–7, 15–9 |