Libreville is the capital and largest city of Gabon, located on the Gabon Estuary. Libreville occupies 65 square kilometres (25 sq mi) of the northwestern province of Estuaire. Libreville is also a port on the Gabon Estuary, near the Gulf of Guinea. As of the 2013 census, its population was 703,904.

The area has been inhabited by the Mpongwe people since before the French acquired the land in 1839. It was later an American Christian mission, and a slave resettlement site, before becoming the chief port of the colony of French Equatorial Africa. By the time of Gabonese independence in 1960, the city was a trading post and minor administrative centre with a population of 32,000. Since 1960, Libreville has grown rapidly and now is home to one-third of the national population.