| South Drain | |
| Country: | England |
| Subdivision Name1: | England |
| Subdivision Type1: | Country |
| Subdivision Type2: | County |
| Subdivision Name2: | Somerset |
| Subdivision Type3: | District |
| Subdivision Name3: | Mendip Sedgemoor |
| Source1: | Read Mead Rhyne |
| Source1 Location: | Street, Somerset, England |
| Source1 Coordinates: | 51.1339°N -2.7313°W |
| Mouth: | Huntspill River |
| Mouth Location: | Highbridge, Somerset, England |
| Mouth Coordinates: | 51.1831°N -2.9065°W |
| Length: | 15 km (9.4 mi) |
| Tributaries Right: | Glastonbury Canal |
The South Drain flows in a generally north-westerly direction from Actis Tunnel to Gold Corner, where it moves on to the Huntspill River, in Somerset, England. It flows through the Shapwick Heath Nature Reserve.
It was constructed between 1802 and 1806 as a result of the Somerset Drainage Act 1801 (41 Geo. 3. (U.K.) c. lxxii).[1]