Ilhéu de Sal Rei is an uninhabited islet near the coast of Boa Vista Island, Cape Verde. It is located 1 km southwest of the island capital Sal Rei. Administratively it is part of the municipality of Boa Vista. Its length is 1.9 km from northwest to southeast and approximately 0.8 km from southwest to northeast. The island has a lighthouse. A narrow strait to its northeast separates it from Boa Vista island. On the south tip of the island the ruined Portuguese fort Duque de Bragança is situated.