| Speed River | |
|---|---|
 | |
 | |
| Location | |
| Country | Canada |
| Province | Ontario |
| Physical characteristics | |
| Source | |
| • location | Orton, Ontario |
| Mouth | |
• location | Grand River at Cambridge |
The Speed River is a river that flows through Wellington County and the Region of Waterloo in southwestern Ontario, Canada. It flows south from its source near Orton, through Guelph, where it is joined by the Eramosa River, then through the towns of Hespeler and Preston, finally uniting with the Grand River in north-west Cambridge.