Apes live in the wild across two continents: Africa and Asia. No native ape species exist in the Americas, Australia, or Europe. The roughly 20 living species split into two groups, great apes and lesser apes, and their ranges stretch from the tropical forests of West Africa to the islands of Southeast Asia.
Great Apes and Lesser Apes
The ape family (Hominoidea) contains two branches. The great apes include chimpanzees, bonobos, gorillas, and orangutans, all large-bodied and closely related to humans. The lesser apes are the gibbons and siamangs, smaller and more acrobatic, with around 20 species spread across southern Asia. Every wild ape population lives within the tropics or just outside them, dependent on forest cover for food and shelter.
Chimpanzees: West to East Africa
Chimpanzees have the widest range of any great ape. Four subspecies span a belt across equatorial Africa from Senegal in the west to Tanzania in the east. Within that range, rivers act as natural boundaries between populations. The Sanaga River in central Cameroon, for example, separates the Nigeria-Cameroon chimpanzee from the central chimpanzee to the south.
Chimpanzees occupy a surprising variety of landscapes. Some populations live in dense lowland rainforest with near-constant canopy cover. Others inhabit the drier forest-woodland-savanna mosaic of central Cameroon, where rainfall and temperature swing more dramatically between seasons. A few communities in Senegal and Tanzania live in open woodland that looks nothing like the stereotypical jungle habitat most people picture.
One notable population lives in the Goualougo Triangle, a remote section of Nouabalé-Ndoki National Park in the Republic of Congo. At least 14 communities of chimpanzees there have had almost no exposure to humans. The Congolese government expanded the park in 2012 to include this area, bringing the total protected zone to about 1,636 square miles of northern Congo forest. Western lowland gorillas share this same habitat.
Gorillas: Central Africa’s Forests and Mountains
Gorillas live exclusively in central Africa, but their two species occupy very different terrain. Western lowland gorillas are found across a broad swath of the Congo Basin, including Cameroon, the Central African Republic, Equatorial Guinea, Gabon, and the Republic of Congo. They favor dense tropical lowland forest and swampy clearings where they feed on fruit and aquatic plants.
Mountain gorillas live at the opposite end of the elevation spectrum, in montane forests between roughly 7,200 and 14,000 feet. Their entire population is confined to two small areas: the Virunga volcanic mountains where the Democratic Republic of Congo, Rwanda, and Uganda meet, and Bwindi Impenetrable Forest in southwestern Uganda. These high-altitude forests are cooler, mistier, and far more rugged than the lowland gorilla’s habitat. A third population, the Cross River gorilla, survives in a handful of fragmented forest patches along the Nigeria-Cameroon border, including the Ebo Forest in Cameroon.
Bonobos: South of the Congo River
Bonobos are the most geographically restricted of the African great apes. They live only in the lowland rainforests of the Democratic Republic of Congo, south of the Congo River. That river acts as a hard boundary: chimpanzees live to the north, bonobos to the south. No other great ape has such a limited natural range, and their entire population exists within a single country. The dense, swampy forest of the central Congo Basin is difficult for humans to access, which has historically offered bonobos some protection but also makes studying them challenging.
Orangutans: Borneo and Sumatra
Orangutans are the only great apes found in Asia. All three species live on two islands in Southeast Asia: Borneo and Sumatra, both part of Indonesia (Borneo is shared with Malaysia and Brunei). The Bornean orangutan inhabits scattered pockets of lowland and hilly forest across the island. Sumatran orangutans are restricted to the northern tip of Sumatra, particularly in and around Gunung Leuser National Park.
The most recently recognized species, the Tapanuli orangutan, was described in 2017. Fewer than 800 individuals survive in a small mountainous area south of Lake Toba in northern Sumatra, making it the rarest great ape on Earth. All three species depend on tropical rainforest canopy, spending most of their lives in the trees and rarely descending to the ground.
Gibbons and Siamangs: Across Southeast Asia
The lesser apes cover a much broader swath of Asia than orangutans do. Various gibbon species range from northeastern India and southern China through Myanmar, Thailand, Laos, Vietnam, Cambodia, and the Malay Peninsula, and out onto the islands of Sumatra, Borneo, and Java. Siamangs, the largest of the lesser apes, are native to the mountains of the Malay Peninsula and Sumatra, where they live in both rainforest and seasonal monsoon forest.
Gibbons are strictly arboreal, rarely if ever touching the ground. They need continuous canopy to swing between trees, which makes them especially vulnerable to logging and road-building that fragments their forest habitat. A few gibbon species once extended into southern China, but most of those populations have been reduced to tiny remnants.
Why Apes Only Live in Africa and Asia
The absence of apes from the Americas and Australia comes down to geography and timing. Apes evolved in Africa roughly 25 million years ago and later spread into Asia across land connections that existed when sea levels were lower. They never made it to the Americas because no land bridge connected Africa or Asia to the New World during the period when apes were diversifying. Some early primates (monkeys and their relatives) did reach South America, likely by rafting across a much narrower Atlantic Ocean on floating vegetation tens of millions of years ago, but apes never made that crossing.
Australia has been isolated from mainland Asia by deep ocean channels for millions of years. Even during ice ages, when sea levels dropped and exposed land bridges to Borneo and Java, the water gaps east of Bali remained too wide for forest-dependent apes to cross. This is the same biogeographic boundary, known as the Wallace Line, that separates most Asian mammals from Australian ones.
Habitats Apes Depend On
Tropical rainforest is the ancestral home of all primates and remains the primary habitat for nearly every ape species. These forests form a closed canopy so dense that the forest floor stays in near-permanent twilight, creating a layered environment where different ape species feed and travel at different heights. Orangutans and gibbons rarely leave the upper canopy. Gorillas spend more time on the ground but still rely on forest cover for food and nesting.
Some apes have adapted to forests that don’t fit the classic tropical rainforest image. Mountain gorillas thrive in cool, wet montane forests above 7,000 feet. Chimpanzees in West Africa manage in dry woodland with scattered trees. Siamangs inhabit monsoon forests that experience distinct wet and dry seasons. But all of these habitats share one feature: enough tree cover to provide food, nesting sites, and protection. When that cover disappears, ape populations collapse. Deforestation for palm oil, logging, and farming is the single biggest threat to wild apes across both continents.