Gabon gäbôN´ [key], officially Gabonese Republic, republic (2005 est. pop. 1,389,000), 103,346 sq mi (267,667 sq km), W central Africa. It borders on the Atlantic Ocean in the west, on Equatorial Guinea and Cameroon in the north, and on Congo (Brazzaville) in the east and south. Libreville (the