William St. Clair | |
|---|---|
| Baron of Roslin | |
 Sinclair, Baron of Roslin coat of arms | |
| Successor | Henry St Clair |
| Died | 1297 |
| Noble family | Clan Sinclair |
| Father | Robert de Saint-Clair |
| Mother | Eleoner Dreux |
William St. Clair, 6th Baron of Roslin (died 1297) was a Scottish nobleman of the late 13th century.