2025 Supersport 300 World Championship
| 2025 Supersport 300 World Championship | |||
| Previous: | 2024 | Next: | 2026 (WorldSPB) |
| Support series: Superbike World Championship Supersport World Championship Women’s Circuit Racing World Championship Yamaha R3 bLU cRU FIM World Cup | |||
The 2025 Supersport 300 World Championship was a part of the 38th season of the Superbike World Championship. It was the final edition of the championship, with a new category set to replace it in 2026. The championship consisted of 16 races across 8 venues.
Beñat Fernández won the championship title at the final round in Jerez.