Leithia
| Leithia Temporal range:  | |
|---|---|
| Skeleton of Lethia melitensis | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Order: | Rodentia | 
| Family: | Gliridae | 
| Subfamily: | Leithiinae | 
| Genus: | †Leithia Lydekker, 1896 | 
| Type species | |
| †Myoxus melitensis Adams, 1863 | |
| species | |
| 
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Leithia is an extinct genus of giant dormice from the Pleistocene of the Mediterranean islands of Malta and Sicily. It is considered an example of island gigantism. Leithia melitensis is the largest known species of dormouse, living or extinct, being twice the size of any other known species.