- There are several cities around the world named Usino, but the one that is most commonly referred to is Usino-Bundi, which is a city in the Madang Province of Papua New Guinea. It is the administrative center of the Usino-Bundi District and serves as a hub for commerce and government services in the region. The city is located in a remote area with a predominantly rural population engaged in subsistence farming and small-scale business activities.