- Mendi is the capital city of the Southern Highlands Province in Papua New Guinea. It is located in the highlands region of the country and has a population of around 50,000 people. Mendi is known for its beautiful scenery, including rolling hills, mountains, and valleys. The city serves as an important regional center for commerce, education, and government services in the Southern Highlands Province. Mendi has a mix of modern infrastructure and traditional tribal influences, making it a unique destination for visitors. It is also a hub for agriculture, with coffee and sweet potatoes being the main crops grown in the region.