Germain's langur (Trachypithecus germaini)[1] is an Old World monkey native to Thailand, Myanmar, Cambodia, Laos and Vietnam.

[4][7] T. germaini and T. margarita were considered to be a single species, T. villosus, but morphological and genetic evidence has shown that they are distinct.

[10] Germain's langur has black colouration on its hands and feet, as well as the upper part of its body which fades into paler grey on its underparts.

[4] The limits of the distribution of Germain's langur are not well known, but they are currently found in Asia, specifically Cambodia, Vietnam, Lao PDR, Myanmar, and Thailand.

[14][15] Trachypithecus germaini, and other Asian colobines, are generally less frequently engaged in social interaction than frugivorous primates such as macaques.

[14][16] They have a lower affinity to social behaviour in comparison to feeding and resting which makes up the majority of their day.

[17] Prevalent threats to Germain's langur include hunting, exotic pet trading, and habitat loss due to agricultural expansion.