The Cedros Island mule deer (Odocoileus hemionus cerrosensis) is a subspecies of mule deer[2] found only on Cedros Island off the coast of Baja California.

There are also differences in fur coloration which distinguish cerrosensis from other mule deer, but most closely resembling Odocoileus hemionus fuliginatus.

Although it may be a may be synonyms of O. h. eremicus or O. h. peninsulae,[5] studies based on DNA samples, rather than observation, can show clearer objective differences.

[6] In the case of the Cedros deer, its status as a valid subspecies can be defended due to their endemicity to the island, morphological differences, and distinct mitochondrial patterns.

[4] Cedros deer primarily occupy the northern side of the island, being less common in the southern section, where human activity is more prevalent.