- Sinoe City is the capital city of Sinoe County in southeastern Liberia. It is located on the Atlantic coast and is one of the major cities in the region. The city has a population of approximately 5,000 people and serves as an administrative and economic center for the county. It is also home to the University of Science and Technology of Sinoe County. Sinoe City has a rich history and is known for its beautiful beaches and natural attractions, including the Greenville National Park.