The Peloncillo Mountains of Cochise County, (Spanish language pelo, hair, pelon, hairless, bald; peloncillo, Little Baldy), is a mountain range in northeast Cochise County, Arizona. A northern north-south stretch of the range extends to the southern region of Greenlee County on the northeast, and a southeast region of Graham County on the northwest. The north stretch of the Peloncillo's forms the border between the two counties.