Belgium (French: Belgique; Dutch: België), officially the Kingdom of Belgium (French: Royaume de Belgique; Dutch: Koninkrijk België) is a constitutional monarchy in Western Europe. Belgium covers an area of 13,683 sq km (5283 sq mi), and it has a population of about six million people. Geographically, Belgium is generally flat, and has a small section of coast on the North Sea. Belgium is agriculturally fertile and densely populated, with a population density of almost 500 people per sq km (1200 per sq mi). It borders France to the west, the Netherlands to the north and east, and Wallonia to the south.