The Duet free routine competition of the Synchronised swimming events at the 2011 World Aquatics Championships was held on July 19 with the preliminary round and the final on 22 July.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
Natalia Ishchenko Svetlana Romashina Alexandra Zueva (reserve) | Jiang Tingting Jiang Wenwen | Ona Carbonell Andrea Fuentes |
The preliminary round was held on July 19.[1] The final was held on July 22.[2]
Green denotes finalists
| Rank | Diver | Nationality | Preliminary | Final | |||
|---|---|---|---|---|---|---|---|
| Points | Rank | Points | Rank | ||||
| Natalia Ishchenko Svetlana Romashina | 98.490 | 1 | 98.410 | 1 | |||
| Jiang Tingting Jiang Wenwen | 96.770 | 2 | 96.810 | 2 | |||
| Ona Carbonell Andrea Fuentes | 96.020 | 3 | 96.500 | 3 | |||
| 4 | Élise Marcotte Marie-Pier Boudreau Gagnon | 94.100 | 4 | 94.950 | 4 | ||
| 5 | Yukiko Inui Chisa Kobayashi | 92.720 | 5 | 92.710 | 5 | ||
| 6 | Daria Iushko Kseniya Sydorenko | 92.100 | 6 | 91.580 | 6 | ||
| 7 | Giulia Lapi Mariangela Perrupato | 90.860 | 7 | 89.800 | 7 | ||
| 8 | Olivia Allison Jenna Randall | 88.520 | 9 | 88.460 | 8 | ||
| 9 | Sara Labrousse Maite Mejean | 88.740 | 8 | 88.100 | 9 | ||
| 10 | Evangelia Platanioti Despoina Solomou | 87.800 | 11 | 86.950 | 10 | ||
| 11 | Mary Killman Lyssa Wallace | 87.970 | 10 | 86.190 | 11 | ||
| 12 | Nayara Figueira Lara Teixeira | 86.520 | 12 | 85.770 | 12 | ||
| 13 | Soňa Bernardová Alžběta Dufková | 86.480 | 13 | ||||
| 14 | Jang Hyang-Mi Wang Ok-Gyong | 86.450 | 14 | ||||
| 15 | Park Hyun-Ha Park Hyun-Sun | 85.600 | 15 | ||||
| 16 | Elisabeth Sneeuw Nicolien Wellen | 85.570 | 16 | ||||
| 17 | Anna Kulkina Aigerim Zhexembinova | 85.490 | 17 | ||||
| 18 | Anastasia Gloushkov Inna Yoffe | 84.840 | 18 | ||||
| 19 | Pamela Fischer Anja Nyffeler | 83.060 | 19 | ||||
| 20 | Nadine Brandl Livia Lang | 82.680 | 20 | ||||
| 21 | Evelyn Guajardo Isabel Delgado | 82.130 | 21 | ||||
| 22 | Etel Sánchez Sofía Sánchez | 80.110 | 22 | ||||
| 23 | Nastassia Mekhanikava Darya Navaselskaya | 79.950 | 23 | ||||
| 24 | Eszter Czekus Szofi Kiss | 79.690 | 24 | ||||
| 25 | Mónica Arango Jennifer Cerquera | 77.900 | 25 | ||||
| 26 | Eloise Amberger Sarah Bombell | 76.690 | 26 | ||||
| 27 | Wiebke Jeske Edith Zeppenfeld | 76.680 | 27 | ||||
| 28 | Iglika Goleminova Kalina Yordanova | 76.650 | 28 | ||||
| 29 | Dasa Baloghova Jana Labathova | 76.240 | 29 | ||||
| 30 | Dalia Mohamed Elgebaly Reem Wail Abdalazem | 76.040 | 30 | ||||
| 31 | Anastasiya Ruzmetova Anastasiya Zdraykovskaya | 75.060 | 31 | ||||
| 32 | Cristina Nicolini Elena Tini | 73.640 | 32 | ||||
| 33 | Katrina Ann Hui Chuen Png | 73.490 | 33 | ||||
| 34 | Caitlin Anderson Kirstin Anderson | 72.630 | 34 | ||||
| 35 | Rosamaria Avila Fredmary Zambrano | 70.550 | 35 | ||||
| 36 | Lianne Caraballo Arianne Rodriguez | 70.330 | 36 | ||||
| 37 | Lacin Akcal Melis Oner | 69.420 | 37 | ||||
| 38 | Stephanie Chen Hui Yu Yap | 68.790 | 38 | ||||
| 39 | Arthittaya Kittithanatphum Nantaya Polsen | 66.560 | 39 | ||||
| 40 | Kou Chin Lo Wai Lam | 65.910 | 40 | ||||
| 41 | Sabihisma Arsyi Tri Eka Sandiri | 65.000 | 41 | ||||
| 42 | Emma Manners-Wood Laura Strugnell | 63.900 | 42 | ||||
| 43 | Nadezhda Gomez Violeta Mitinian | 63.750 | 43 | ||||