- Epena is a city located in the Cuvette-Ouest department in the Republic of Congo. It is situated in the northern part of the country and is the administrative capital of the Cuvette-Ouest department. Epena is known for its lush green landscape and is surrounded by dense forests and rivers. The city primarily relies on agriculture and logging as its main economic activities. The population of Epena is approximately 9,000 people.