- Mussau City is the capital city of Manus Province in Papua New Guinea. It is located on the island of Manus in the Bismarck Sea. Mussau City is the main administrative and economic center of the province. It has a population of around 7,000 people and is home to government offices, commercial establishments, schools, and health facilities. The city is also known for its natural beauty, with pristine beaches and coral reefs attracting tourists and divers. Additionally, Mussau City serves as a hub for transportation and communication for the surrounding islands in Manus Province.