| Rat | |
| Name Other: | Rattlesden River |
| Pushpin Map: | United Kingdom Suffolk |
| Pushpin Map Caption: | Location of the river mouth within Suffolk |
| Subdivision Type1: | Country |
| Subdivision Name1: | England |
| Subdivision Type3: | Region |
| Subdivision Name3: | Suffolk |
| Length: | 15.5km (09.6miles) |
| Source1 Location: | Felsham |
| Source1 Coordinates: | 52.1663°N 0.8486°W |
| Source1 Elevation: | 80m (260feet) |
| Mouth Location: | Stowmarket |
| Mouth Coordinates: | 52.1822°N 1.0071°W |
| Mouth Elevation: | 26m (85feet) |
| River System: | River Gipping |
The River Rat is a river in the county of Suffolk in East Anglia, England.[1]
Its source is to the south of the village of Felsham, and is the major tributary of the River Gipping. The River Rat joins the River Gipping at Pikes Meadow in Stowmarket.
The river flows through the village of Rattlesden, and is also known as the Rattlesden River.[2]