Western gorillas are endemic to western central Africa where they live; Gorilla g. gorilla is distributed over six or seven countries from south of Sanaga R. south through S. Cameroon, SW Central African Republic, mainland Equatorial Guinea (Rio Muni/Mbini), and Gabon, into extreme N. Angola (Cabinda enclave) to Congo R., and east into W. Congo and across the Sangha R. to about the Oubangui R. Western boundary is the Atlantic Ocean.