Arli National Park often called Arly is a national park located in southeastern Burkina Faso. It adjoins Benin's Pendjari National Park in the South and the Singou Reserve in the West.
The Arli National Park is set in 760 square kilometres with a wide variety of habitats, ranging from the gallery forests of the Arli and Pendjari rivers to savanna woodland and sandstone hills of the Gobnangou chain. It is home to around 200 elephants, 200 hippos and 100 lion. There are also buffalo, baboons, red and green monkeys, warthog, boar and various antelope such as western hartebeest and roan antelope. There are also bushbucks, duikers and waterbuck.
The park can be accessed via the N19 highway via Diapaga (in the dry season also via Pama). Arli National Park has several pools, such as Tounga where there is a waterhole and there are two pools which are often visited by up to twenty hippos.
The park was earlier a habitat for the West African wild dog (Lycaon pictus manguensis), although this canid is likely extirpated from the local area due to an expanding human population and a lack of national protection.