Hoollongapar Gibbon Sanctuary is an isolated protected area of evergreen forest located in Jorhat district of Assam, India. It is named after the Hoolock Gibbon, the only ape to be found in India. The Hoolock Gibbon can be seen through the forest reserve usually in pairs. The reserve itself is set in a picture-perfect landscape, encompassed by scenic tea gardens and quaint villages. The flora of the reserve is dominated by the tall Hoolang trees along with Nahar trees.