- Ouesso is the capital city of the Sangha department in the Republic of Congo. It is located in the northern part of the country, near the borders with Cameroon and the Central African Republic. Ouesso is known for its natural beauty, with the Sangha River and surrounding rainforests being popular attractions for tourists. The city has a population of around 20,000 people and is an important economic center in the region, particularly for the timber industry. Overall, Ouesso is a vibrant and bustling city with a unique mix of urban and natural landscapes.