墨西哥狼（Canis lupus baileyi）是狼的最为稀少及遗传上较疏离的亚种，分布在北美洲。

墨西哥狼是狼最细小的亚种，最长只有1.2-1.5米，最高0.8米。重约27-37公斤。

The Mexican wolf (Canis lupus baileyi), also known as the lobo, is a subspecies of gray wolf once native to southeastern Arizona, southern New Mexico, western Texas and northern Mexico. It is the smallest of North America's gray wolves, and is similar to C. l. nubilus, though it is distinguished by its smaller, narrower skull and its darker pelt, which is yellowish-gray and heavily clouded with black over the back and tail. Its ancestors were likely the first gray wolves to enter North America after the extinction of the Beringian wolf, as indicated by its southern range and basal physical and genetic characteristics.