Ilhéu Rabo de Junco is an uninhabited islet near the west coast of Sal Island, Cape Verde. It lies about from the coast. It is long and wide, its shoreline is about long. It is the only islet near the island of Sal. Baía da Murdeira lies to the southeast of the islet. Further east is the highest point in southern Sal named Rabo de Junco, which has an elevation of . The islet is part of the marine nature reserve Baía da Murdeira.