Robert the Magnificent (French: le Magnifique)[a] (22 June 1000 – 1–3 July 1035), is the Duke of Normandy from 1027 until his death.

Owing to uncertainty over the numbering of the Dukes of Normandy, he is usually called Robert I, but sometimes Robert II with his ancestor Rollo as Robert I.

He is the father of William the Conqueror, who becomes in 1066 King of England and founds the House of Normandy.