The roloway monkey (Cercopithecus roloway) is an endangered species of Old World monkey endemic to tropical West Africa. It was previously considered a subspecies of the Diana monkey (C. diana). It is classified as Critically Endangered due to habitat loss and continued hunting for the bushmeat trade. The roloway monkeys are mainly arboreal species, for the most part inhabiting forests in Ghana and some reserves in South-Eastern Côte-D'Ivoire. More specifically studies have shown that the C. diana roloway is mostly concentrated in Tanoé forest because of their heavy threats to extinction.