Henry St Clair

• Henry I Sinclair, Earl of Orkney
• Henry I St Clair of Herdmanston
• Henry II Sinclair, Earl of Orkney
• Henry Sinclair (disambiguation)
• Henry Sinclair, 4th Lord Sinclair
• Henry Sinclair, 6th Lord Sinclair
• Henry Sinclair, 7th Lord Sinclair
• Henry St Clair, 7th Baron of Roslin
• Henry St. Clair (American politician)