Bernhard III
Bernhard III may refer to:
- Bernard III, Duke of Saxony
- Bernhard III, Prince of Anhalt-Bernburg, German prince of the House of Ascania
- Bernhard III of Trent
- Bernhard III, Duke of Saxe-Meiningen, last reigning duke of Saxe-Meiningen
- Bernhard III, Margrave of Baden-Baden, inherited in 1515 part of his father's margraviate of Baden