Philautus aurantium (common names: Mendolong bubble-nest frog, golden-legged bush frog) is a species of frog in the family Rhacophoridae. It is endemic to Borneo and found in the Mount Kinabalu region in Sabah and Sarawak, Malaysia. Philautus gunungensis is sometimes considered its subspecies, Philautus aurantium gunungensis.