| Maruyama River | |
| Name Other: | 円山川 |
| Subdivision Type1: | Country |
| Subdivision Name1: | Japan |
| Subdivision Type2: | State |
| Subdivision Name2: | Honshu |
| Subdivision Type3: | Region |
| Subdivision Name3: | Hyōgo |
| Length: | 68km (42miles) |
| Mouth: | Sea of Japan |
| Mouth Coordinates: | 35.6557°N 134.8435°W |
| Basin Size: | 1300km2 |
The Maruyama River is a river in Hyōgo Prefecture, Japan.[1]