Robert the Strong (Old Frank: Rutpert) (died September 15, 866), also known as Robert IV, was a count of Tours. He was nominated by Charles the Bald missus dominicus for the Tours and Angers regions in 853. After a rebellion against Charles II in 855, he became duke for the region between Seine and Loire. From this time he was responsible for fighting against Normans and Britons, and he eventually met his demise in 866 fighting the Normans in the Battle of Brissarthe.

He was possibly married to Adelaide, daughter of Louis the Pious and Ermengarde of Hesbaye. Robert was the father of Odo, Count of Paris and Robert I of France, who both became King of Western Francia. Robert was the great-grandfather of Hugh Capet and thus the ancestor of all the Capetians.