Sir Henry Seton Steuart FRSE LLD (né Steuart; 20 October 1759 – 11 March 1836) was a Scottish landowner, agricultural improver, soldier and classical scholar.
He was born Henry Steuart at Allanton House in Lanarkshire in 1759, the son of Margaret Steuart-Barclay of Collairnie and her husband, James Steuart, 10th Laird of Allanton.
He was educated at the High School in Edinburgh then studied in Hamburg in Germany (1775).
His proposers were Alexander Fraser Tytler, Andrew Dalzell and Thomas Charles Hope.
[4] Sir Walter Scott visited him at Allanton to see his land improvements in January 1829.