| River Alham | |
| Subdivision Type1: | Country |
| Subdivision Name1: | England |
| Subdivision Type2: | County |
| Subdivision Type3: | County |
| Subdivision Name3: | Somerset |
| Subdivision Type5: | City |
| Subdivision Name5: | Milton Clevedon |
| Length Km: | 16 |
| Source1: | Higher Alham |
| Source1 Location: | Somerset, England |
| Source1 Coordinates: | 51.1711°N -2.4636°W |
| Mouth: | River Brue |
| Mouth Location: | Alford, Somerset, England |
| Mouth Coordinates: | 51.0936°N -2.5675°W |
The River Alham flows through Somerset, England.
It rises at Higher Alham above Batcombe and runs through Alhampton, Milton Clevedon and joins the River Brue to the north of Alford.
It was known as the Alauna in Roman times.[1]
The river supported several mills between the Domesday Book and the 18th century.[2] One of them, at Alhampton, has had an Archimedes' screw turbine installed to generate hydro-electric power.[3]
Boulter's Bridge, which spans the border between Ditcheat and West Bradley parishes, is of medieval origin[4] and has been designated as a scheduled monument.[5]