| Biggar Water | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Scotland, United Kingdom |
| Subdivision Type2: | Council area |
| Subdivision Name2: | South Lanarkshire |
| Subdivision Type3: | OS grid reference |
| Pushpin Map: | UK Scotland |
| Pushpin Map Relief: | yes |
| Mouth: | Confluence with the River Tweed |
Biggar Water is a river in Lanarkshire and Peeblesshire, in the Southern Uplands of Scotland.
It forms part of the River Tweed system. It rises, as Biggar Burn, in the north-east of the parish of Biggar, South Lanarkshire and flows about generally south-westerly toward the town of Biggar, where it becomes Biggar Water. It then flows about eastwards before its confluence with the Tweed mile north-east of Drumelzier in Peeblesshire.[1]