| River Biss | |
|---|---|
 The River Biss flowing under the town bridge in Trowbridge | |
 | |
| Location | |
| Country | United Kingdom |
| Region | Wiltshire |
| Physical characteristics | |
| Source | |
| • location | near Upton Scudamore, Wiltshire |
| • coordinates | 51°13′42″N 2°11′40″W / 51.22833°N 2.19444°W |
| Mouth | |
• location | Staverton, Wiltshire |
• coordinates | 51°20′12″N 2°12′56″W / 51.33667°N 2.21556°W |
| Length | 18.385 km (11.424 mi) |
| Discharge | |
| • location | Staverton, Wiltshire |
The River Biss is a small river in Wiltshire, England. It is a tributary of the Bristol Avon. The river rises on Salisbury Plain and passes through Westbury and Trowbridge, before meeting the Avon at Widbrook Wood near Staverton, north of Trowbridge.