- Siassi City is a small city located in the Morobe Province of Papua New Guinea. It is situated on the island of Siassi, which is part of the Siassi Islands group. The city has a population of around 3,000 people and is known for its beautiful beaches and natural scenery. Siassi City serves as a hub for trade and transportation in the region, with a small port that connects it to other parts of Papua New Guinea. The city also has basic infrastructure, including schools and healthcare facilities, to cater to the needs of its residents. Overall, Siassi City provides a peaceful and picturesque environment for its residents and visitors.