Where in the World is Brazzaville found? Brazzaville is the capital of Republic of the Congo (Republic of the Congo), situated in the Middle Africa subregion of Africa. In Brazzaville, the currency used is Central African CFA franc (Fr), which is the official currency used in Republic of the Congo. The Latitude, Longitude cordinates of Brazzaville are -4.2658, 15.2832.