| Final 20:07 | time | +time | L | | | 1. United States |  | 3:52.05 | WR | 06 | Stats | | 2. Australia |  | 3:54.02 | +1.97s | 04 | Stats | | 3. Japan |  | 3:55.73 | +3.68s | 05 | Stats | | 4. Russia |  | 3:56.03 | +3.98s | 08 | Stats | | 5. China |  | 3:56.41 | +4.36s | 01 | Stats | | 6. Netherlands |  | 3:57.28 | +5.23s | 02 | Stats | | 7. Denmark |  | 3:57.76 | +5.71s | 03 | Stats | | 8. Great Britain |  | 3:59.46 | +7.41s | 07 | Stats |
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| Heat 1 | time | +time | L | Rk | React. | | | 1. Netherlands | | 3:59.19 | - | 07 | 5. | 0.62 | Times | | 2. China | | 3:59.38 | +0.19 | 04 | 7. | 0.65 | Times | | 3. Russia | | 3:59.57 | +0.38 | 05 | 8. | 0.68 | Times | | 4. Germany |  | 3:59.95 | +0.76 | 03 | 9. | 0.74 | Times | | 5. Italy |  | 4:02.20 | +3.01 | 02 | 11. | 0.69 | Times | | 6. Canada |  | 4:02.71 | +3.52 | 06 | 12. | 0.67 | Times | | 7. France |  | 4:05.53 | +6.34 | 01 | 14. | 0.62 | Times | | -. Hungary |  | DQ | - | 08 | | | Times |
| Heat 2 | time | +time | L | Rk | React. | | | 1. Australia | | 3:55.42 | - | 05 | 1. | 0.66 | Times | | 2. Japan | | 3:57.87 | +2.45 | 03 | 2. | 0.60 | Times | | 3. Denmark | | 3:58.35 | +2.93 | 02 | 3. | 0.65 | Times | | 4. United States | | 3:58.88 | +3.46 | 04 | 4. | 0.60 | Times | | 5. Great Britain | | 3:59.37 | +3.95 | 06 | 6. | 0.66 | Times | | 6. Sweden |  | 4:00.76 | +5.34 | 07 | 10. | 0.73 | Times | | 7. Spain |  | 4:03.05 | +7.63 | 01 | 13. | 0.73 | Times | | 8. Iceland |  | 4:07.09 | +11.67 | 08 | 15. | 0.70 | Times |
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| 12 Best WC 2011 | WC | Odds | | World 2011 Women 4x100m Medley Relay | | 1. United States | 1 | 1/9 | | 2. China | 2 | 5/1 | | 3. Australia | 3 | 14/1 | | 4. Russia | 4 | 22/1 | | 5. Japan | 5 | 25/1 | | 6. Germany | 8 | 33/1 | | 7. Great Britain | 6 | 33/1 | | 8. Canada | 7 | | | 9. Denmark | 9 | | | 11.Sweden | 10 | | | 12.Netherlands | 11 | 40/1 | | 13.Spain | 12 | |
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| Next best times | WC | | 10.Italy | 14 | | 14.France | 13 | | 15.Iceland | | | 16.Hungary | |
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London 2012