William Sinclair

• Angel in My Pocket
• W. E. N. Sinclair
• William Angus Sinclair
• William H. Sinclair
• William Henry Sinclair
• William John Sinclair
• William Pirrie Sinclair
• William Sinclair (Archdeacon of London)
• William Sinclair (United Irishmen)
• William Sinclair (bishop)
• William Sinclair (cricketer)
• William Sinclair (footballer)
• William Sinclair (fur trader)
• William Sinclair (priest)
• William Sinclair, 1st Earl of Caithness
• William Sinclair, 2nd Earl of Caithness