Round-tailed Muskrat
Neofiber alleni
- Least concern
- Card rarity: Common
- Mammals

The round-tailed muskrat is a species of rodent in the family Cricetidae, sometimes called the Florida water rat. The species is the only extant member of the genus Neofiber. It is found only in the Southeastern United States, where its natural habitat is swamps.
Classification
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Neofiber