| Games: | World Aquatics Championships |
| Nf: | VIE |
| Nfname: | Vietnam Aquatic Sports Association |
| Year: | 2023 |
| Flagcaption: | Flag of Vietnam |
| Location: | Fukuoka, Japan |
| Competitors: | 10 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
Vietnam is set to compete at the 2023 World Aquatics Championships in Fukuoka, Japan from 14 to 30 July.
See main article: Swimming at the 2023 World Aquatics Championships. Vietnam entered 10 swimmers.[1]
| Athlete | Event | Heat | Semifinal | Final | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | ||||||||||||||||||||||||
| Đỗ Ngọc Vĩnh | 400 metre freestyle | 4:02.05 | 36 | Did not advance | |||||||||||||||||||||||||
| Hồ Nguyễn Duy Khoa | 200 metre butterfly | 2:11.47 | 36 | Did not advance | |||||||||||||||||||||||||
| Hoàng Quý Phước | 200 metre freestyle | 1:53.67 | 46 | Did not advance | |||||||||||||||||||||||||
| align=left rowspan=3 | Luong Jérémie Loïc Nino | 50 metre freestyle | 23.39 | 61 | Did not advance | ||||||||||||||||||||||||
| 100 metre freestyle | 51.34 | 62 | Did not advance | ||||||||||||||||||||||||||
| 50 metre butterfly | 24.56 | 54 | Did not advance | ||||||||||||||||||||||||||
| Mai Trần Tuấn Anh | 800 metre freestyle | 8:08.56 | 32 | Did not advance | |||||||||||||||||||||||||
| Nguyễn Hữu Kim Sơn | 1500 metre freestyle | 16:20.45 | 27 | Did not advance | |||||||||||||||||||||||||
| Nguyễn Quang Thuấn | 400 metre individual medley | 4:25.92 | 23 | Did not advance | |||||||||||||||||||||||||
| align=left rowspan=3 | Phạm Thanh Bảo | 50 metre breaststroke | 29.17 | 45 | Did not advance | ||||||||||||||||||||||||
| 100 metre breaststroke | 1:03.37 | 46 | Did not advance | ||||||||||||||||||||||||||
| 200 metre breaststroke | 2:17.89 | 34 | Did not advance | ||||||||||||||||||||||||||
| align=left rowspan=2 | Trần Hưng Nguyên | 200 metre backstroke | 2:07.40 | 34 | Did not advance | ||||||||||||||||||||||||
| 200 metre individual medley | 2:05.77 | 35 | Did not advance | ||||||||||||||||||||||||||
| Hoàng Quý Phước Luong Jérémie Loïc Nino Trần Hưng Nguyên Nguyễn Quang Thuấn | 4 × 100 m freestyle relay | 3:27.63 | 21 | Did not advance | |||||||||||||||||||||||||
| Do Ngoc Vinh Nguyễn Hữu Kim Sơn Mai Tran Tuan Anh Nguyen Quang Thuan | 4 × 200 m freestyle relay | 7:44.33 | 17 | Did not advance | |||||||||||||||||||||||||
| |Mai Trần Tuấn Anh Phạm Thanh Bảo Hồ Nguyễn Duy Khoa Luong Jérémie Loïc Nino|align=left| 4 × 100 m medley relay| 3:56.18| 22| colspan="2" | colspan=2| Did not advance|}
References] | |||||||||||||||||||||||||||||