Iolaus alcibiades, the giant sapphire, is a butterfly in the Lycaenidae family. It is found in Guinea, Sierra Leone, Ivory Coast, Ghana, Togo, Nigeria (south and the Cross River loop), Cameroon, Bioko, Gabon, the Republic of the Congo and the Democratic Republic of the Congo (Équateur and Lulua). The habitat consists of forests and more open habitats.
The larvae feed on the flowers of Loranthus incanus. They are associated with the ant species Crematogaster buchneri.