The Count of Boulogne is a historical title in the kingdom of France. The city of Boulogne-sur-Mer became the center of the county of Boulogne during the ninth century. Little is known of the early counts, but the first held the title during the 11th century.

The County of Boulogne was a county within the kingdom of France during the 9th to 15th centuries, centred on the city of Boulogne-sur-Mer. It was ruled by the counts of Flandres in the 10th century, but a separate House of Boulogne emerges in the 11th. It was annexed by Philip II of France in 1212 and after this was treated as part of the county of Artois, until it was finally annexed into the royal domain in 1550.