List of extinct rodents

This list is of rodent species that are extinct − no longer alive.

Species from related groups such as Lagomorpha (rabbits and hares) are not included.

Genus	Species	Notes	Location	Approx. max. weight	Stratigraphy
Castor	C. californicus	An extinct beaver species	Western North America		Late Miocene to Early Pleistocene^[1]
Castoroides		Giant beavers	North America	Up to 100 kg (220 lb)	Pleistocene^[1]
Ceratogaulus		Horned gophers	North America	Smallest horned mammal	Late Miocene to Pliocene^[2]
Spelaeomys	S. florensis	A large cave rat	Flores	-	Extinct by 1500^[3]
"Giant hutias"		A paraphyletic group of rodents resembling large guinea pigs	West Indies	Up to 200 kg (440 lb)	Pleistocene^[4]
Leithia		A giant dormouse	Europe (Malta, Sicily)	113 g (4.0 oz)	Pleistocene^[5]
Neochoerus	N. pinckneyi	A large capybara	North America	100 kg (220 lb)	Pleistocene^[6]
Josephoartigasia	J. monesi	'Giant pacarana', largest known rodent	South America	1,500 kg (3,300 lb)	Pliocene to Early Pleistocene^[7]
Phoberomys	P. pattersoni	A horse-sized rodent^[8]	North America	Probably under 280 kg (620 lb);^[8] earlier estimates up to 700 kg (1,500 lb)^[9]	Miocene^[8]
Telicomys		A giant rodent, to 2 metres (6 ft 7 in) long	South America	Perhaps 70% of size of P. pattersoni^[8]	Late Miocene to Early Pleistocene^[8]

Before 1500