The Congo Basin rainforest spans six countries in Central Africa: Cameroon, the Central African Republic, the Democratic Republic of the Congo, the Republic of the Congo, Equatorial Guinea and Gabon. Together, these countries contain the world’s second-largest tropical rainforest after the Amazon, a vast natural region whose forests, rivers and wetlands support wildlife, Indigenous communities and millions of other people.
The answer depends partly on what is meant by the Congo Basin. The rainforest is often described as a six-country ecosystem, but the wider geographical basin and surrounding forest landscapes extend beyond those six nations. This distinction matters because the Congo Basin is not simply a stretch of dense trees. It is a much larger environmental system shaped by rivers, wetlands, grasslands and different types of tropical forest.
The six countries most commonly associated with the Congo Basin rainforest each have a different place within this landscape. The Democratic Republic of the Congo, often shortened to the DRC, contains by far the largest share of the region’s forest. The Republic of the Congo, its neighbour across the Congo River, also contains extensive rainforest, while Gabon is known for its substantial remaining forest cover. Cameroon, the Central African Republic and Equatorial Guinea complete the six-country group.
The Democratic Republic of the Congo is particularly important to the scale of the ecosystem. Its forests form a major part of the central African rainforest belt, including extensive lowland and swamp forests. The country’s size means that changes in its forest cover can have significant consequences for the wider region. Forest clearance, agricultural expansion and other pressures therefore extend beyond a domestic environmental concern, affecting a landscape that crosses national boundaries.
In the Republic of the Congo, forests form a similarly important part of the country’s natural environment and economy. Gabon, meanwhile, retains extensive forest cover across much of its territory. In Cameroon, rainforest sits alongside other environments, creating a varied landscape that includes different forest types and areas of transition. The Central African Republic contains important forest areas in its south, while Equatorial Guinea contributes to the region’s tropical forest diversity despite being much smaller than its neighbours.
These forests are not ecologically uniform. They include dense lowland rainforest, seasonally flooded forests, swamp forests and other habitats that support different plants and animals. The wider Congo Basin is home to species such as forest elephants, gorillas, chimpanzees and bonobos, alongside a remarkable variety of birds, insects, fish and plant life. Some species are found across several countries, while others depend on more limited habitats.
The basin’s importance also reaches far beyond wildlife. Forests absorb and store carbon, influence water cycles and help regulate local and regional climates. They provide food, medicinal resources, building materials and livelihoods for communities that depend on them. WWF estimates that around 60 million people rely directly on Congo Basin forests for resources including food, medicine, materials and shelter.
The political map, however, does not capture the full geographical extent of the basin. The Congo River and its tributaries drain a much wider area than the six countries commonly listed as the main Congo Basin rainforest nations. Depending on the geographical definition being used, parts of countries such as Angola, Burundi, Rwanda, Uganda and others may be included in descriptions of the wider basin or its surrounding forest landscape. A 2025 assessment by the Science Panel for the Congo Basin, for example, identifies extensive areas in six core countries and smaller areas in a further six nations.
This explains why different sources sometimes give different country counts. Some describe the six countries with extensive Congo Basin forest cover. Others examine the hydrological basin, which is defined by the land that drains into a river system, or use a broader ecological boundary that includes smaller forest areas beyond the core region. These are related but not identical ways of mapping the same part of Africa.
For readers asking specifically how many countries share the Congo Basin rainforest, six is the standard answer. The countries are Cameroon, the Central African Republic, the Democratic Republic of the Congo, the Republic of the Congo, Equatorial Guinea and Gabon. The wider basin has a more complex geographical reach, but these six nations form the core of the rainforest region most widely recognised in conservation and environmental reporting.
Protecting the forest requires cooperation across those borders. Wildlife moves between habitats that do not stop at customs posts, rivers connect distant communities and forest loss in one area can affect the health of the wider ecosystem. Conservation programmes have therefore supported cross-border collaboration, including protected landscapes shared by Cameroon, the Central African Republic and the Republic of the Congo.
The Congo Basin rainforest belongs to no single country. Its core forest landscape is shared by six nations, each with its own communities, development priorities and conservation challenges. Understanding that shared geography is an essential starting point for understanding why the future of Central Africa’s forests depends on decisions made across the region, rather than within any one national boundary.
