| Marbel River | |
| Pushpin Map: | Mindanao#Philippines |
| Subdivision Type1: | Country |
| Subdivision Name1: | Philippines |
| Subdivision Type2: | Region |
| Subdivision Name2: | Soccsksargen |
| Subdivision Type3: | Province |
| Subdivision Name3: | Cotabato |
| Source1: | foot of Mount Apo |
| Mouth: | Kabacan River |
| Mouth Coordinates: | 7.1202°N 124.8847°W |
| Progression: | Marbel–Kabacan–Pulangi–Mindanao |
The Marbel River, also known as the Marbol River and the Sulphur River, is a river in the province of Cotabato in the Philippines. It is located at the foot of Mount Apo. The Marble River connects to the Kabacan River in Cotabato, a tributary of the Pulangi River which empties into the Rio Grande de Mindanao in Cotabato City.