| Final 20:43 | time | +time | L | | | 1. Australia |  | 3:33.15 | OR | 04 | Stats | | 2. Netherlands |  | 3:33.79 | +0.64s | 03 | Stats | | 3. United States |  | 3:34.24 | +1.09s | 05 | Stats | | 4. China |  | 3:36.75 | +3.60s | 06 | Stats | | 5. Great Britain |  | 3:37.02 | +3.87s | 08 | Stats | | 6. Denmark |  | 3:37.45 | +4.30s | 07 | Stats | | 7. Japan |  | 3:37.96 | +4.81s | 02 | Stats | | -. Sweden |  | DQ | - | 01 | Stats |
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| Heat 1 | time | +time | L | Rk | React. | | | 1. United States | | 3:36.53 | - | 04 | 2. | 0.75 | Times | | 2. China | | 3:37.91 | +1.38 | 05 | 4. | 0.72 | Times | | 3. Japan | | 3:38.06 | +1.53 | 06 | 5. | 0.75 | Times | | 4. Great Britain | | 3:38.21 | +1.68 | 02 | 7. | 0.67 | Times | | 4. Sweden | | 3:38.21 | +1.68 | 03 | 7. | 0.70 | Times | | 6. Russia |  | 3:39.59 | +3.06 | 07 | 10. | 0.73 | Times | | 7. Belarus |  | 3:40.67 | +4.14 | 08 | 13. | 0.75 | Times | | 8. Hungary |  | 3:44.79 | +8.26 | 01 | 15. | 0.67 | Times |
| Heat 2 | time | +time | L | Rk | React. | | | 1. Australia | | 3:36.34 | - | 03 | 1. | 0.68 | Times | | 2. Netherlands | | 3:37.76 | +1.42 | 04 | 3. | 0.71 | Times | | 3. Denmark | | 3:38.09 | +1.75 | 02 | 6. | 0.70 | Times | | 4. Germany |  | 3:39.16 | +2.82 | 05 | 9. | 0.70 | Times | | 5. Canada |  | 3:39.60 | +3.26 | 06 | 11. | 0.77 | Times | | 6. Italy |  | 3:39.74 | +3.40 | 07 | 12. | 0.70 | Times | | 7. New Zealand |  | 3:42.55 | +6.21 | 01 | 14. | 0.72 | Times | | 8. Greece |  | 3:45.55 | +9.21 | 08 | 16. | 0.62 | Times |
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| 12 Best WC 2011 | WC | Odds | | World 2011 Women 4x100m Freestyle Relay | | 1. Netherlands | 1 | 4/5 | | 2. United States | 2 | 11/5 | | 3. Germany | 3 | 10/1 | | 4. China | 4 | 12/1 | | 5. Australia | 5 | 6/1 | | 6. Sweden | 10 | | | 7. Canada | 6 | | | 8. Japan | 7 | | | 9. Denmark | 8 | | | 10.Great Britain | 9 | 66/1 | | 12.Russia | 11 | | | 16.Belarus | 12 | |
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| Next best times | WC | | 11.Italy | | | 13.New Zealand | 14 | | 14.Hungary | | | 15.Greece | |
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London 2012