Which country has a total area of 643,801 square kilometers, including overseas regions? The answer is France.
France’s commonly cited total land area is 643,801 square kilometers when its overseas departments and territories are included, with Adélie Land in Antarctica excluded from that calculation. Metropolitan France, the European portion, covers about 551,500 km², so the overseas possessions make a substantial difference to the national total.
Those territories give France a worldwide geographic presence. French Guiana lies in South America, Réunion and Mayotte are in the Indian Ocean, and Guadeloupe and Martinique are in the Caribbean. France also administers territories and collectivities in the Pacific and around the Atlantic, Indian, and Southern oceans.
A frequent mistake is to use only the area of metropolitan France, producing a much smaller figure. Another overlooked detail is that France has land borders beyond Europe: French Guiana borders Brazil and Suriname, while Saint Martin shares an island with the Netherlands. The precise total varies slightly by source and territorial-area convention.