Canariomys is an extinct genus of rodents (Old World rats and mice) that once existed on the islands of Tenerife and Gran Canaria, part of the Canary Islands, Spain. These giant rats could reach a weight of about 1 kg. The species was a herbivore; its diet was based on plant materials, probably soft vegetables as some roots, ferns, berries... but not grass.
Two species are currently recognised:
- Tenerife Giant Rat, Canariomys bravoi (Tenerife, Pleistocene)
- Gran Canaria Giant Rat, Canariomys tamarani (Gran Canaria, Holocene)