The southern plains gray langur (Semnopithecus dussumieri) is a species of primate in the family Cercopithecidae. It is found in south west and west central India. Commonly known as Hanuman langur, this is the most widely found species of langur in India. Typical habitat includes rural and forested areas. However, they can be seen in several cities as well. They usually reside and forage in groups. It had been previously recognized as a subspecies of the northern plains gray langur, Semnopithecus entellus, i.e., Semnopithecus entellus dussumieri.