- Oyem is a city located in the northern part of Gabon, which is a country in Central Africa. It is the capital of the Woleu-Ntem province and is situated near the border with Cameroon. Oyem is also the third-largest city in Gabon and serves as an important economic and administrative center. The city has a population of around 60,000 people and is known for its cultural and historical significance. Oyem is surrounded by lush forests and is a gateway to the Ogooué River basin, offering opportunities for eco-tourism and nature exploration.