Henry St Clair

Henry St Clair or Sinclair may refer to:

• Henry I St Clair of Herdmanston 12th century Scottish noble
• Henry St Clair, 7th Baron of Roslin 13th-14th Scottish baron
• Henry St. Clair (American politician), politician who represented Macon County, Alabama in 1872
• Henry I Sinclair, Earl of Orkney
• Henry II Sinclair, Earl of Orkney
• Henry Sinclair, 4th Lord Sinclair
• Henry Sinclair, 6th Lord Sinclair
• Henry Sinclair, 7th Lord Sinclair