| 1991 All England Championships | |
| Dates: | – |
| Number Edition: | 81st |
| Venue: | Wembley Arena |
| Location: | London |
| Previous: | < 1990 |
| Next: | 1992 > |
The 1991 Yonex All England Open was the 81st edition of the All England Open Badminton Championships. It was held from March 13 to March 17, 1991, in London, England.
It was a five-star tournament and the prize money was US$125,000.
| Category | Winners | Runners-up | Score | |
|---|---|---|---|---|
| Men's singles | Ardy Wiranata | Foo Kok Keong | 15–12, 15–10 | |
| Women's singles | Susi Susanti | Sarwendah Kusumawardhani | 0–11, 11–2, 11–6 | |
| Men's doubles |  Li Yongbo & Tian Bingyi |  Kim Moon-soo & Park Joo-bong | 12–15, 15–7, 15–8 | |
| Women's doubles | Chung So-young & Hwang Hye-young |  Kimiko Jinnai & Hisako Mori | 15–5, 15–3 | |
| Mixed doubles | Park Joo-bong & Chung Myung-hee | Thomas Lund & Pernille Dupont | 15–10, 10–15, 15–4 |