| Games: | World Aquatics Championships |
| Nf: | VIE |
| Nfname: | Vietnam Aquatic Sports Association |
| Year: | 2015 |
| Flagcaption: | Flag of Vietnam |
| Location: | Kazan, Russia |
| Competitors: | 5 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| App Begin Year: | 2011 |
Vietnam competed at the 2015 World Aquatics Championships in Kazan, Russia from 24 July to 9 August 2015.
See main article: Swimming at the 2015 World Aquatics Championships. Vietnamese swimmers have achieved qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the A-standard entry time, and 1 at the B-standard):[1] [2] [3]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=3 | Hoàng Quý Phước | 100 m freestyle | 51.21 | =59 | Did not advance | |||
| 200 m freestyle | 1:54.31 | 63 | Did not advance | |||||
| 100 m butterfly | Did not advance | |||||||
| Lâm Quang Nhật | 1500 m freestyle | 15:54.56 | 41 | Did not advance | ||||
| align=left rowspan=3 | Lê Nguyễn Paul | 50 m backstroke | 26.14 | 36 | Did not advance | |||
| 100 m backstroke | 56.95 | 44 | Did not advance | |||||
| 200 m backstroke | 2:04.78 | 32 | Did not advance | |||||
| align=left rowspan=2 | Trần Duy Khôi | 200 m individual medley | 2:04.30 | 31 | Did not advance | |||
| 400 m individual medley | 4:27.43 | 35 | Did not advance | |||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=3 | Nguyễn Thị Ánh Viên | 200 m freestyle | 2:00.80 | 31 | Did not advance | |||
| 200 m individual medley | 2:13.41 | 16 Q | 2:13.29 | 15 | Did not advance | |||
| 400 m individual medley | 4:38.78 | 10 | Did not advance | |||||