| Event: | Women's duet |
| Games: | 2008 Summer |
| Venue: | Beijing National Aquatics Center |
| Date: | 18–20 August 2008 |
| Competitors: | 48 |
| Nations: | 24 |
| Gold: | Anastasia Davydova Anastasia Ermakova |
| Goldnoc: | RUS |
| Silver: | Andrea Fuentes Gemma Mengual |
| Silvernoc: | ESP |
| Bronze: | Saho Harada Emiko Suzuki |
| Bronzenoc: | JPN |
| Win Value: | 99.251 |
| Win Label: | Winning points |
| Prev: | 2004 |
| Next: | 2012 |
The women's duet synchronized swimming event at the 2008 Summer Olympics was held from August 18 to 20, at the Beijing National Aquatics Center.
24 duets competed, each consisting of two swimmers, and there were two rounds of competition. The preliminary round consisted of a technical routine and a free routine. Finalists performed a second free routine, adding that score to the preliminary technical routine round score. The technical routine consisted of ten required elements, which had to be completed in order and within a time of between 2 minutes 5 seconds and 2 minutes 35 seconds. The free routine had no restrictions other than time; this routine had to last between 3 minutes 15 seconds and 3 minutes 45 seconds.
For each routine, the team was judged by two panels of five judges each. One panel is the technical jury, the other is the artistic jury. Each judge gives marks of between 0 and 10. The highest and lowest score from each panel are dropped, leaving a total of six scores which are then summed to give the routine's score. The scores of the two routines are then added to give a final score for the team.
| Rank | Country | Athlete | Technical | Free | Total | |
|---|---|---|---|---|---|---|
| Anastasia Davydova & Anastasiya Yermakova | 49.334 | 49.917 | 99.251 | |||
| Andrea Fuentes & Gemma Mengual | 48.834 | 49.500 | 98.334 | |||
| Saho Harada & Emiko Suzuki | 48.250 | 48.917 | 97.167 | |||
| Jiang Tingting & Jiang Wenwen | 48.084 | 48.250 | 96.334 | |||
| Christina Jones & Andrea Nott | 47.750 | 47.750 | 95.500 | |||
| Marie-Pier Boudreau Gagnon & Isabelle Rampling | 47.417 | 47.667 | 95.084 | |||
| Beatrice Adelizzi & Giulia Lapi | 46.834 | 46.917 | 93.751 | |||
| Daria Iushko & Kseniya Sydorenko | 46.084 | 46.584 | 92.668 | |||
| Bianca van der Velden & Sonja van der Velden | 45.584 | 46.083 | 91.667 | |||
| 10 | Evanthia Makrygianni & Despoina Solomou | 45.834 | 45.667 | 91.501 | ||
| 11 | Apolline Dreyfuss & Lila Meesseman-Bakir | 44.750 | 45.583 | 90.333 | ||
| 12 | Magdalena Brunner & Ariane Schneider | 44.250 | 45.000 | 89.250 |