400 m, Men
| Competition | 2025 South-East Asian Games (SEA Games) |
|---|---|
| Venue |
Bangkok, Chonburi
 THA
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Joshua Atkinson | THA |
45.13 | ||
| 🥈 | Tạ Ngọc Tưởng |  VIE |
45.53 | ||
| 🥉 | Lê Ngọc Phúc | VIE |
46.21 |