Argentine swamp rat
Scapteromys aquaticus
- Least concern
- Card rarity: Common
- Mammals

The Argentine swamp rat is a semiaquatic rodent species from South America. It is found in northeastern Argentina and Paraguay, where it lives in freshwater marshes and along the southern coast of the Río de la Plata estuary, as well as in woodland.
Classification
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Scapteromys