Papilio constantinus, the Constantine's swallowtail, is a butterfly of the family Papilionidae. It is found in Sub-Saharan Africa. The wingspan is 70–90 mm in males and 80–95 mm in females. Its flight period is during the warmer months peaking from November to February. The larvae feed on Vepris reflexa, Vepris lanceolata, Vepris undulata, Clausena species, Citrus species, Teclea trifoliatum, Teclea nobilis, and Teclea gerrardii.