| Games: | World Aquatics Championships |
| Nf: | VIE |
| Nfname: | Vietnam Aquatic Sports Association |
| Year: | 2017 |
| Flagcaption: | Flag of Vietnam |
| Location: | Budapest, Hungary |
| Competitors: | 6 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| App Begin Year: | 2011 |
Vietnam competed at the 2017 World Aquatics Championships in Budapest, Hungary from 14 July to 30 July.
See main article: Swimming at the 2017 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]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=4 | Hoàng Quý Phước | 50 m freestyle | 23.56 | 67 | Did not advance | |||
| 100 m freestyle | 49.67 | 37 | Did not advance | |||||
| 200 m freestyle | 1:49.87 | =40 | Did not advance | |||||
| 100 m butterfly | 54.76 | 52 | Did not advance | |||||
| align=left rowspan=2 | Lê Nguyễn Paul | 50 m backstroke | 25.64 | 32 | Did not advance | |||
| 100 m backstroke | 56.64 | 34 | Did not advance | |||||
| align=left rowspan=2 | Nguyễn Hữu Kim Sơn | 1500 m freestyle | 15:29.90 NR | 30 | Did not advance | |||
| 400 m individual medley | 4:26.07 | 30 | Did not advance | |||||
| Nguyễn Ngọc Huỳnh | 200 m butterfly | 2:03.57 | 39 | Did not advance | ||||
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=3 | Nguyễn Thị Ánh Viên | 400 m freestyle | Did not advance | |||||
| 200 m individual medley | 2:13.36 | 18 | Did not advance | |||||
| 400 m individual medley | 4:40.39 | 10 | Did not advance | |||||
| align=left rowspan=2 | Nguyễn Thị Nhất Lam | 100 m breaststroke | 1:15.99 | 41 | Did not advance | |||
| 200 m breaststroke | 2:45.25 | 30 | Did not advance | |||||