| 1984 All England Championships | |
| Dates: | – |
| Number Edition: | 74th |
| Venue: | Wembley Arena |
| Location: | London |
| Previous: | < 1983 |
| Next: | 1985 > |
The 1984 Yonex All England Open Championships was the 74th edition held in 1984, at Wembley Arena, London.
| Category | Winners | Runners-up | Score | |
|---|---|---|---|---|
| Men's singles | Morten Frost | Liem Swie King | 9–15, 15–10, 15–10 | |
| Women's singles |  Li Lingwei | Han Aiping | 11–5, 11–8 | |
| Men's doubles | Rudy Heryanto & Hariamanto Kartono | Mike Tredgett & Martin Dew | 15–11, 15–6 | |
| Women's doubles | Lin Ying & Wu Dixi |  Kim Yun-ja & Yoo Sang-hee | 15–8, 8–15, 17–14 | |
| Mixed doubles | Martin Dew & Gillian Gilks | Nigel Tier & Gillian Gowers | 15–8, 15–3 |