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