John Stewart, 3rd Earl of Buchan

John Stewart, 3rd Earl of Buchan is the name of the following people:

• John Stewart, 3rd Earl of Buchan († 1424) (around 1381–1424), Scottish nobleman, title from 1404, Connétable of France
• John Stewart, 3rd Earl of Buchan († 1551) (before 1499–1551), Scottish nobleman, title from 1505

This is a disambiguation page for differentiating between several terms identified with the same word.