Robert Bruce, 2nd Baron of Clackmannan

Sir Robert Bruce, 2nd Baron of Clackmannan & Rate (died 23 July 1403) was the son of Sir Thomas Bruce 1st Baron of Clackmannan and Marjorie Charteris of Stenhouse.

Robert Bruce was born in Clackmannan, Scotland the son of Thomas Bruce, 1st Baron of Clackmannan and his wife Marjory. Robert received more land in Clackmannan in 1359 from his cousin, King David II, and additional land in Rate, Scotland in 1367.

He married Isabel Stewart the daughter of Robert Stewart of Durisdeer, Dumfriesshire, with whom he had at least four children:

• Robert Bruce, 3rd Baron of Clackmannan;
• Alexander Bruce;
• Thomas Bruce, of Wester Kennet (who had a charter for those and other lands on 2 May 1389); and
• Helen Bruce, who married David Ross of Balnagown.

Robert was captured and killed on 23 July 1403, during the Battle of Shrewsbury, and his son Robert succeeded him as third baron.