Brazil is the largest country that shares a land border with France, through French Guiana in South America.
France’s longest international land border is not in Europe: it is the border between Brazil and French Guiana, an overseas department and region of France. The boundary follows rivers and extends for more than 700 kilometres.
Brazil is the fifth-largest country in the world by total area and the largest in South America. It borders every South American country except Chile and Ecuador, and its northern frontier with French Guiana makes France one of Brazil’s neighbouring states.
The border was settled through late nineteenth-century diplomacy after disputes over the area. Today, the Oyapock River forms much of the boundary, and a bridge links Oiapoque in Brazil with Saint-Georges in French Guiana.