Rhaebo olallai is a species of toad in the family Bufonidae endemic to Ecuador. Its common name is Tandayapa Andes toad, after its type locality, Tandayapa, in the Pichincha Province); the species has not been seen there after 1970, despite search efforts. It is only known from another locality in the Imbabura Province of Ecuador (Manduriacu River). It has also been reported from one locality on the Colombian Massif, Nariño Department, Colombia, but these have been shown to represent Rhaebo colomai.