Kemp's grass mouse
Deltamys kempi
- Least concern
- Card rarity: Common
- Mammals

Kemp's grass mouse is a species of South American rodent in the family Cricetidae. It is the only species in the genus Deltamys. It was formerly considered a member of the genus Akodon, but is now considered sufficiently distinct to warrant its own genus. It is named for Robin Kemp, who collected specimens of mice from the area for the British Museum.
Classification
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Deltamys