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The women's 400 metre freestyle S7 event at the 2012 Paralympic Games took place on 6 September, at the London Aquatics Centre.

Two heats were held, one with six swimmers and one with five swimmers. The swimmers with the eight fastest times advanced to the final.

Heats

Rank	Lane	Name	Nationality	Time	Notes
1	4	Susannah Rodgers	Great Britain	5:22.08	Q, EU
2	5	Ani Palian	Ukraine	5:23.49	Q
3	2	Brianna Nelson	Canada	5:46.00	Q
4	6	Erel Halevi	Israel	5:48.43
5	3	Susana Ribeiro	Brazil	5:58.64

Rank	Lane	Name	Nationality	Time	Notes
1	4	Jacqueline Freney	Australia	5:01.04	Q, PR
2	5	Cortney Jordan	United States	5:25.75	Q
3	3	Rebecca Dubber	New Zealand	5:27.79	Q
4	2	Katrina Porter	Australia	5:44.50	Q
5	6	Verena Schott	Germany	5:46.04	Q
6	7	Jessica Sarai Aviles Hernandez	Mexico	6:05.13

Rank	Lane	Name	Nationality	Time	Notes
	4	Jacqueline Freney	Australia	4:59.02	WR
	6	Cortney Jordan	United States	5:18.55
	5	Susannah Rodgers	Great Britain	5:18.93	EU
4	3	Ani Palian	Ukraine	5:21.73
5	2	Rebecca Dubber	New Zealand	5:30.05
6	1	Brianna Nelson	Canada	5:40.64
7	7	Katrina Porter	Australia	5:41.48
8	8	Verena Schott	Germany	5:42.26

"Women's 400m Freestyle - S7". The London Organising Committee of the Olympic Games and Paralympic Games Limited. Retrieved 6 September 2012.^{[permanent dead link]}

Swimming at the 2012 Summer Paralympics
Women's events
50 m freestyle			S3		S5
	S6	S7	S8	S9	S10
	S11	S12	S13
100 m freestyle			S3		S5
	S6	S7	S8	S9	S10
	S11	S12	S13
200 m freestyle					S5
				S14
400 m freestyle	S6	S7	S8	S9	S10
	S11	S12
50 m backstroke		S2		S4
100 m backstroke	S6	S7	S8	S9	S10
	S11	S12		S14
100 m breaststroke				SB4	SB5
	SB6	SB7	SB8	SB9
	SB11	SB12	SB13	SB14
50 m butterfly					S5
	S6	S7
100 m butterfly			S8	S9	S10
		S12
200 m medley					SM5
	SM6	SM7	SM8	SM9	SM10
	SM11	SM12	SM13
Freestyle relays	4 × 100 m (34pts)
Medley relays	4 × 100 m (34pts)