Duna (also known as Yuna) is a Papuan language of Papua New Guinea. It may belong to the Trans New Guinea language family and is often further classified as a Duna-Pogaya language, for Bogaya appears to be Duna's closest relative, as evidenced by the similar development of the personal pronouns. Estimates for number of speakers range from 11,000 (1991) to 25,000 (2002).