Cephalomys
| Cephalomys Temporal range:  | |
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| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Mammalia | 
| Order: | Rodentia | 
| Family: | †Cephalomyidae | 
| Genus: | †Cephalomys Ameghino, 1897 | 
| Synonyms | |
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Cephalomys is an extinct genus of rodent that inhabited South America during the Oligocene and Miocene epochs.