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.

• Wembley Arena

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

	Round of 32							Round of 16							Quarter-finals							Semi-finals
		Zhao Jianhua	17	15
		Joko Suprianto	14	8					Jianhua	17	7	15
		Kim Hak-kyun	15	15					Hak-kyun	16	15	9
		Søren Nielsen	11	5												Jianhua	9	17	15
		Morten Frost	15	15												Kusuma	15	15	0
		Andrey Antropov	8	9					Frost	15	15
		Alan Budikusuma	15	15					Kusuma	9	8
		Matthew A Smith	4	4																			Jianhua	11	7
		Foo Kok Keong	12	17	15																		Foo	15	15
		Hermawan Susanto	15	15	9				Foo	12	15	15
		Jens Peter Nierhoff	12	15	15				Nierhoff	15	12	2
		Rong Chen	15	11	4											Foo	15	15
		Darren Hall	9	15	15											Hall	8	10
		Fung Permadi	15	12	10				Hall	15	15
		Claus Thomsen	15	15					Thomsen	8	5
		Jeroen van Dijk	5	11

	Round of 32							Round of 16							Quarter-finals							Semi-finals
		Hiroki Eto	18	15
		Kevin Scott	13	12					Scott	6	8
		Poul-Erik Høyer Larsen	15	15					Høyer Larsen	15	15
		Peter Bush	5	9												Høyer Larsen	15	15	15
		Eddy Kurniawan	15	15												Wenkai	17	4	6
		Steve Butler	6	4					Butler	7	5
		Wu Wenkai	15	15					Wenkai	15	15
		Lee Gwang-jin	8	8																			Wenkai	15	16	5
		Ahn Jae-chang	15	15																			Wiranata	8	17	15
		Torben Carlsen	2	5					Stuer-Lauridsen	17	16	15
		Thomas Stuer-Lauridsen	15	8	15				Jae-chang	16	18	12
		Rashid Sidek	8	15	4											Stuer-Lauridsen	11	3
		Peter Espersen	9	15	15											Wiranata	15	15
		Claus Overbeck	15	12	7				Espersen	15	15
		Ardy Wiranata	15	15					Wiranata	3	5
		Kent Waede Hansen	3	5

	Round of 32							Round of 16							Quarter-finals							Semi-finals
		Susi Susanti	11	11
		Pornsawan Plungwech	7	1					Susanti	11	11
		Denyse Julien	11	11					Julien	7	4
		Rhonda Robertson	2	3												Susanti	11	11
		Hu Ning	11	9	11											Hu Ning	5	0
		Helen Troke	7	12	2				Hu Ning	12	12
		Gil Young-Ah	9	11	11				Young-Ah	10	10
		Christine Magnusson	12	9	8																		Susanti	11	12
		Huang Hua	11	11																			Huang Hua	4	10
		Julia Mann	0	2					Huang Hua	11	11
		Harumi Kohara	11	3	12				Kohhara	8	1
		Julie Bradbury	2	11	9											Huang Hua	11	11
		Pernille Nedergaard	7	11	11											Eun-Jung	5	1
		Katrina Schmidt	11	5	3				Nedergaard	11	6	5
		Shim Eun-Jung	11	10	11				Eun-Jung	3	11	11
		Eline Coene	7	12	3

	Round of 32							Round of 16							Quarter-finals							Semi-finals
		Sarwendah Kusumawardhani	11	11
		Maria De La Paz Luna	3	3					Kusumawardhani	11	11
		Somharuthai Jaroensiri	11	12					Jaroensiri	3	7
		Natalja Ivanova	8	10												Kusumawardhani	11	11
		Doris Piche	11	11												Zhou Lei	1	4
		Astrid van der Knaap	9	6					Piche	5	11	1
		Zhou Lei	11	11					Zhou Lei	11	7	11
		Jeanette Kuhl	2	1																			Kusumawadhani	11	10	11
		Elena Rybkina	12	11																			Tang Jiuhong	5	12	8
		Erica van den Heuvel	9	8					Rybkina	11	4	4
		Camilla Martin	11	11					Martin	7	11	11
		Gillian Martin	6	3												Martin	4	1
		Bang Soo-Hyun	6	11	11											Tang Jiuhong	11	11
		Joanne Muggeridge	11	3	6				Soo-Hyun	12	7	2
		Tang Jiuhong	11	11					Tang Jiuhong	10	11	11
		Lisbet Stuer-Lauridsen	2	5

• Smash: 1991 All England Open