Sir Henry St Clair was a 13th- and 14th-century Scottish noble, who was the 7th Baron of Roslin and Lord of Catcune.

Henry was the son of William St. Clair and Amicia de Roskelyn.

[1] He fought at the Battle of Dunbar on 27 April 1296, where he and his father William were captured and he became a prisoner of King Edward I of England at St Briavels Castle.

Fought with his two sons John and William at the Battle of Bannockburn on 23–24 June 1314.

Henry married Alice de Fenton, daughter of William de Fenton of Baikie and Beaufort and Cecilia Bisset, and is known to have had the following issue;