| | Event type

4 × 100 metres Medley Relay, Women

Date	3 – 4 August 2012
Status	Olympic
Location	London Aquatics Centre, Olympic Park, Stratford, London / London Aquatics Centre, Olympic Park, Stratford, London
Participants	76 from 16 countries

This event ended the 2012 Olympic women’s swimming program in the pool. The United States was favored as they had medalists from the individual 100 metre events in the backstroke in Missy Franklin, breaststroke in Rebecca Soni, and the butterfly with Dana Vollmer, with Franklin and Vollmer having won gold. Franklin put the USA into the lead early, and she, Soni, and Vollmer posted the fastest splits for each of their strokes, giving Schmitt a comfortable lead for the freestyle finisher. Schmitt brought it home in 53.25 to give the US a gold medal and a world record 3:52.05, bettering the Chinese mark from the 2009 World Championships, set in skinsuits. Behind the US Australia took silver with Japan winning bronze.

For Schmitt and Franklin it was the end of a highly successful Olympics, as they won the most medals by any of the women in London with five. Franklin won four gold medals and Schmitt three, with Franklin’s four swimming gold medals at one Olympics trailing only the six won in 1988 by East German Kristin Otto. Vollmer also finished London 2012 with three gold medals, in the 100 fly and two relays, while Soni won three medals and two golds, finishing her Olympic career with six medals and three golds.

Pos	Competitors	NOC	R1	Final
1	United States	USA	3:58.88 (4 h2)	3:52.05 (1)	Gold
	Missy Franklin • Rebecca Soni • Dana Vollmer • Allison Schmitt • Rachel Bootsma • Breeja Larson • Claire Donahue • Jessica Hardy
2	Australia	AUS	3:55.42 (1 h2)	3:54.02 (2)	Silver
	Emily Seebohm • Leisel Jones • Alicia Coutts • Mel Schlanger • Brittany Elmslie
3	Japan	JPN	3:57.87 (2 h2)	3:55.73 (3)	Bronze
	Aya Terakawa • Satomi Suzuki • Yuka Kato • Haruka Ueda
4	Russian Federation	RUS	3:59.57 (3 h1)	3:56.03 (4)
	Anastasiya Zuyeva • Yuliya Yefimova • Irina Bespalova • Veronika Popova • Mariya Gromova
5	People's Republic of China	CHN	3:59.38 (2 h1)	3:56.41 (5)
	Zhao Jing • Ji Liping • Lu Ying • Tang Yi • Gao Chang • Sun Ye • Jiao Liuyang
6	Netherlands	NED	3:59.19 (1 h1)	3:57.28 (6)
	Sharon van Rouwendaal • Moniek Nijhuis • Inge Dekker • Ranomi Kromowidjojo • Femke Heemskerk
7	Denmark	DEN	3:58.35 (3 h2)	3:57.76 (7)
	Mie Ø. Nielsen • Rikke Møller Pedersen • Jeanette Ottesen Gray • Pernille Blume
8	Great Britain	GBR	3:59.37 (5 h2)	3:59.46 (8)
	Gemma Spofforth • Siobhan-Marie O'Connor • Ellen Gandy • Fran Halsall • Jemma Lowe • Amy Smith
9	Germany	GER	3:59.95 (4 h1)	–
	Jenny Mensing • Sarah Poewe • Alexandra Wenk • Britta Steffen
10	Sweden	SWE	4:00.76 (6 h2)	–
	Sarah Sjöström • Jennie Johansson • Martina Granström • Michelle Coleman
11	Italy	ITA	4:02.20 (5 h1)	–
	Arianna Barbieri • Michela Guzzetti • Ilaria Bianchi • Federica Pellegrini
12	Canada	CAN	4:02.71 (6 h1)	–
	Julia Wilkinson • Tera Van Beilen • Katerine Savard • Samantha Cheverton
13	Spain	ESP	4:03.05 (7 h2)	–
	Duane Da Rocha • Marina García • Judit Ignacio • Melani Costa
14	France	FRA	4:05.53 (7 h1)	–
	Laure Manaudou • Fanny Babou • Justine Bruno • Charlotte Bonnet
15	Iceland	ISL	4:07.09 (8 h2)	–
	Eygló Ósk Gústafsdóttir • Hrafnhildur Lúthersdóttir • Sarah Bateman • Eva Hannesdóttir
DQ	Hungary	HUN	– (DQ h1)	–
	Evelyn Verrasztó • Anna Sztankovics • Zsu Jakabos • Eszter Dara

Round One

Date	3 August 2012 — 11:35
Format	Fastest 8 teams advanced to the final round.

Pos	Lane	Team	NOC	Time
1	5	Australia	AUS	3:55.42	Q
2	3	Japan	JPN	3:57.87	Q
3	2	Denmark	DEN	3:58.35	Q
4	4	United States	USA	3:58.88	Q
5	7	Netherlands	NED	3:59.19	Q
6	6	Great Britain	GBR	3:59.37	Q
7	4	People's Republic of China	CHN	3:59.38	Q
8	5	Russian Federation	RUS	3:59.57	Q
9	3	Germany	GER	3:59.95
10	7	Sweden	SWE	4:00.76
11	2	Italy	ITA	4:02.20
12	6	Canada	CAN	4:02.71
13	1	Spain	ESP	4:03.05
14	1	France	FRA	4:05.53
15	8	Iceland	ISL	4:07.09
DQ	8	Hungary	HUN	–

Heat #1

Time	11:35

Pos	Lane	Competitors	NOC	Time	Reaction Time	50 m Time	Split	Exchange
1	7	Netherlands	NED	3:59.19	–	–	– (–)	– (–)	Q
Backstroke	–	Sharon van Rouwendaal		–	0.62	29.94	1:00.98 (4)	– (–)
Breaststroke	–	Moniek Nijhuis		–	0.15	30.8	1:06.98 (2)	2:07.96 (2)
Butterfly	–	Inge Dekker		–	0.22	26.37	57.43 (1)	3:05.39 (1)
Freestyle	–	Femke Heemskerk		–	0.37	25.62	53.80 (3)	– (–)
2	4	People's Republic of China	CHN	3:59.38	–	–	– (–)	– (–)	Q
Backstroke	–	Gao Chang		–	0.65	29.83	1:00.41 (1)	– (–)
Breaststroke	–	Sun Ye		–	0.12	31.92	1:08.01 (4)	2:08.42 (4)
Butterfly	–	Jiao Liuyang		–	0.21	27.01	57.56 (2)	3:05.98 (3)
Freestyle	–	Tang Yi		–	0.49	25.57	53.40 (2)	– (–)
3	5	Russian Federation	RUS	3:59.57	–	–	– (–)	– (–)	Q
Backstroke	–	Mariya Gromova		–	0.68	29.56	1:01.53 (7)	– (–)
Breaststroke	–	Yuliya Yefimova		–	0.3	30.9	1:05.84 (1)	2:07.37 (1)
Butterfly	–	Irina Bespalova		–	0.2	27.07	58.33 (4)	3:05.70 (2)
Freestyle	–	Veronika Popova		–	0.14	25.63	53.87 (4)	– (–)
4	3	Germany	GER	3:59.95	–	–	– (–)	– (–)
Backstroke	–	Jenny Mensing		–	0.74	29.69	1:01.02 (5)	– (–)
Breaststroke	–	Sarah Poewe		–	0.09	30.99	1:07.19 (3)	2:08.21 (3)
Butterfly	–	Alexandra Wenk		–	0.2	27.31	58.85 (5)	3:07.06 (5)
Freestyle	–	Britta Steffen		–	0.23	25.55	52.89 (1)	– (–)
5	2	Italy	ITA	4:02.20	–	–	– (–)	– (–)
Backstroke	–	Arianna Barbieri		–	0.69	29.61	1:00.80 (3)	– (–)
Breaststroke	–	Michela Guzzetti		–	0.31	31.93	1:08.62 (6)	2:09.42 (6)
Butterfly	–	Ilaria Bianchi		–	0.28	26.64	57.59 (3)	3:07.01 (4)
Freestyle	–	Federica Pellegrini		–	0.12	26.50	55.19 (7)	– (–)
6	6	Canada	CAN	4:02.71	–	–	– (–)	– (–)
Backstroke	–	Julia Wilkinson		–	0.67	29.19	1:00.49 (2)	– (–)
Breaststroke	–	Tera Van Beilen		–	0.29	31.47	1:08.12 (5)	2:08.61 (5)
Butterfly	–	Katerine Savard		–	0.20	26.96	59.00 (6)	3:07.61 (6)
Freestyle	–	Samantha Cheverton		–	0.18	26.49	55.10 (5)	– (–)
7	1	France	FRA	4:05.53	–	–	– (–)	– (–)
Backstroke	–	Laure Manaudou		–	0.62	29.55	1:01.09 (6)	– (–)
Breaststroke	–	Fanny Babou		–	0.34	32.88	1:09.14 (7)	2:10.23 (7)
Butterfly	–	Justine Bruno		–	0.39	27.79	1:00.17 (7)	3:10.40 (7)
Freestyle	–	Charlotte Bonnet		–	0.32	26.54	55.13 (6)	– (–)
DQ	8	Hungary	HUN	–	–	–	– (–)	– (–)
Backstroke	–	Evelyn Verrasztó		–	[0.67]	[31.04]	[1:03.39] ([8])	– (–)
Breaststroke	–	Anna Sztankovics		–	[0.36]	[32.24]	[1:10.43] ([8])	[2:13.82] ([8])
Butterfly	–	Zsu Jakabos		–	[0.09]	–	– (–)	– (–)
Freestyle	–	Eszter Dara		–	–	–	– (–)	– (–)

Heat #2

Pos	Lane	Competitors	NOC	Time	Reaction Time	50 m Time	Split	Exchange
1	5	Australia	AUS	3:55.42	–	–	– (–)	– (–)	Q
Backstroke	–	Emily Seebohm		–	0.66	28.61	58.57 (1)	– (–)
Breaststroke	–	Leisel Jones		–	0.11	30.87	1:05.96 (1)	2:04.53 (1)
Butterfly	–	Alicia Coutts		–	0.43	27.1	57.45 (2)	3:01.98 (1)
Freestyle	–	Brittany Elmslie		–	0.44	25.6	53.44 (1)	– (–)
2	3	Japan	JPN	3:57.87	–	–	– (–)	– (–)	Q
Backstroke	–	Aya Terakawa		–	0.6	28.98	59.19 (2)	– (–)
Breaststroke	–	Satomi Suzuki		–	0.17	31.48	1:07.15 (=4)	2:06.34 (2)
Butterfly	–	Yuka Kato		–	0.2	26.35	57.73 (4)	3:04.07 (2)
Freestyle	–	Haruka Ueda		–	0.35	25.83	53.80 (3)	– (–)
3	2	Denmark	DEN	3:58.35	–	–	– (–)	– (–)	Q
Backstroke	–	Mie Ø. Nielsen		–	0.65	29.09	1:00.27 (5)	– (–)
Breaststroke	–	Rikke Møller Pedersen		–	0.42	31.66	1:07.15 (=4)	2:07.42 (4)
Butterfly	–	Jeanette Ottesen Gray		–	0.29	26.15	56.74 (1)	3:04.16 (3)
Freestyle	–	Pernille Blume		–	0.34	26.21	54.19 (5)	– (–)
4	4	United States	USA	3:58.88	–	–	– (–)	– (–)	Q
Backstroke	–	Rachel Bootsma		–	0.6	28.78	59.70 (3)	– (–)
Breaststroke	–	Breeja Larson		–	0.31	31.37	1:06.66 (2)	2:06.36 (3)
Butterfly	–	Claire Donahue		–	0.47	26.55	58.05 (5)	3:04.41 (4)
Freestyle	–	Jessica Hardy		–	0.23	25.84	54.47 (6)	– (–)
5	6	Great Britain	GBR	3:59.37	–	–	– (–)	– (–)	Q
Backstroke	–	Gemma Spofforth		–	0.66	29.45	1:00.02 (4)	– (–)
Breaststroke	–	Siobhan-Marie O'Connor		–	0.14	31.24	1:08.10 (6)	2:08.12 (5)
Butterfly	–	Jemma Lowe		–	0.1	26.52	57.56 (3)	3:05.68 (5)
Freestyle	–	Amy Smith		–	0.27	25.55	53.69 (2)	– (–)
6	7	Sweden	SWE	4:00.76	–	–	– (–)	– (–)
Backstroke	–	Sarah Sjöström		–	0.73	29.96	1:01.38 (7)	– (–)
Breaststroke	–	Jennie Johansson		–	0.39	31.51	1:06.94 (3)	2:08.32 (6)
Butterfly	–	Martina Granström		–	0.15	27.15	58.46 (6)	3:06.78 (6)
Freestyle	–	Michelle Coleman		–	0.21	25.65	53.98 (4)	– (–)
7	1	Spain	ESP	4:03.05	–	–	– (–)	– (–)
Backstroke	–	Duane Da Rocha		–	0.73	29.83	1:00.43 (6)	– (–)
Breaststroke	–	Marina García		–	0.28	32.13	1:08.35 (7)	2:08.78 (7)
Butterfly	–	Judit Ignacio		–	0.33	27.41	59.07 (7)	3:07.85 (7)
Freestyle	–	Melani Costa		–	0.34	26.61	55.20 (7)	– (–)
8	8	Iceland	ISL	4:07.09	–	–	– (–)	– (–)
Backstroke	–	Eygló Ósk Gústafsdóttir		–	0.7	29.8	1:01.74 (8)	– (–)
Breaststroke	–	Hrafnhildur Lúthersdóttir		–	0.23	31.99	1:09.19 (8)	2:10.93 (8)
Butterfly	–	Sarah Bateman		–	0.37	27.47	1:00.04 (8)	3:10.97 (8)
Freestyle	–	Eva Hannesdóttir		–	0.24	26.78	56.12 (8)	– (–)

Final Round

Date	4 August 2012 — 20:07

Pos	Lane	Competitors	NOC	Time	Reaction Time	50 m Time	Split	Exchange
1	6	United States	USA	3:52.05	–	–	– (–)	– (–)
Backstroke	–	Missy Franklin		–	0.64	28.81	58.50 (1)	– (–)
Breaststroke	–	Rebecca Soni		–	0.38	30.84	1:04.82 (1)	2:03.32 (1)
Butterfly	–	Dana Vollmer		–	0.22	25.93	55.48 (1)	2:58.80 (1)
Freestyle	–	Allison Schmitt		–	0.42	25.68	53.25 (4)	– (–)
2	4	Australia	AUS	3:54.02	–	–	– (–)	– (–)
Backstroke	–	Emily Seebohm		–	0.66	28.75	59.01 (3)	– (–)
Breaststroke	–	Leisel Jones		–	0.16	31.06	1:06.06 (4)	2:05.07 (4)
Butterfly	–	Alicia Coutts		–	0.21	26.53	56.41 (2)	3:01.48 (2)
Freestyle	–	Mel Schlanger		–	0.22	25.43	52.54 (1)	– (–)
3	5	Japan	JPN	3:55.73	–	–	– (–)	– (–)
Backstroke	–	Aya Terakawa		–	0.60	29.11	58.99 (2)	– (–)
Breaststroke	–	Satomi Suzuki		–	0.25	31.21	1:05.96 (3)	2:04.95 (3)
Butterfly	–	Yuka Kato		–	0.24	26.24	57.36 (6)	3:02.31 (3)
Freestyle	–	Haruka Ueda		–	0.41	25.91	53.42 (6)	– (–)
4	8	Russian Federation	RUS	3:56.03	–	–	– (–)	– (–)
Backstroke	–	Anastasiya Zuyeva		–	0.69	28.85	59.13 (4)	– (–)
Breaststroke	–	Yuliya Yefimova		–	0.25	30.24	1:04.98 (2)	2:04.11 (2)
Butterfly	–	Irina Bespalova		–	0.36	27.35	58.59 (8)	3:02.70 (4)
Freestyle	–	Veronika Popova		–	0.00	25.42	53.33 (5)	– (–)
5	1	People's Republic of China	CHN	3:56.41	–	–	– (–)	– (–)
Backstroke	–	Zhao Jing		–	0.58	29.32	59.86 (7)	– (–)
Breaststroke	–	Ji Liping		–	-0.03	30.75	1:06.94 (7)	2:06.80 (6)
Butterfly	–	Lu Ying		–	0.10	26.32	56.80 (3)	3:03.60 (6)
Freestyle	–	Tang Yi		–	0.26	24.92	52.81 (2)	– (–)
6	2	Netherlands	NED	3:57.28	–	–	– (–)	– (–)
Backstroke	–	Sharon van Rouwendaal		–	0.63	29.43	1:00.72 (8)	– (–)
Breaststroke	–	Moniek Nijhuis		–	0.28	30.75	1:06.74 (5)	2:07.46 (7)
Butterfly	–	Inge Dekker		–	0.15	26.09	56.91 (5)	3:04.37 (7)
Freestyle	–	Ranomi Kromowidjojo		–	0.21	25.17	52.91 (3)	– (–)
7	3	Denmark	DEN	3:57.76	–	–	– (–)	– (–)
Backstroke	–	Mie Ø. Nielsen		–	0.66	29.26	59.76 (6)	– (–)
Breaststroke	–	Rikke Møller Pedersen		–	0.04	30.88	1:06.77 (6)	2:06.53 (5)
Butterfly	–	Jeanette Ottesen Gray		–	0.22	25.85	56.83 (4)	3:03.36 (5)
Freestyle	–	Pernille Blume		–	0.23	26.29	54.40 (8)	– (–)
8	7	Great Britain	GBR	3:59.46	–	–	– (–)	– (–)
Backstroke	–	Gemma Spofforth		–	0.66	29.25	59.46 (5)	– (–)
Breaststroke	–	Siobhan-Marie O'Connor		–	0.36	32.01	1:08.45 (8)	2:07.91 (8)
Butterfly	–	Ellen Gandy		–	0.45	26.33	57.47 (7)	3:05.38 (8)
Freestyle	–	Fran Halsall		–	0.22	25.54	54.08 (7)	– (–)