Cactus Deermouse
Peromyscus eremicus
- Least concern
- Card rarity: Common
- Mammals

The cactus mouse or cactus deermouse is a species of rodent in the family Cricetidae. It is a species of the genus Peromyscus, a closely related group of New World mice often called "deermice". They are native to desert areas of western North America.
Classification
- Class
- Mammalia
- Order
- Rodentia
- Family
- Cricetidae
- Genus
- Peromyscus