, officially the Principality of Monaco is a sovereign city-state, country and microstate located on the French Riviera in Western Europe. France borders the country on three sides while the other side borders the Mediterranean Sea. Monaco has an area of 2.02 km2 (0.78 sq mi) and a population of about 38,400, according to the last census of 2016.
With 19,009 inhabitants per km², it is the second-smallest and most densely populated sovereign state in the world. Monaco has a land border of 5.47 km (3.40 mi), a coastline of 3.83 km (2.38 mi), and a width that varies between 1,700 and 349 m (1,859 and 382 yd). The highest point in the country is a narrow pathway named Chemin des Révoires on the slopes of Mont Agel, in the Les Révoires Ward, which is 161 metres (528 feet) above sea level. Monaco's most populous Quartier is Monte Carlo and the most populous Ward is Larvotto/Bas Moulins. Through land reclamation, Monaco's land mass has expanded by twenty percent; in 2005, it had an area of only 1.974 km2 (0.762 sq mi). Monaco is known as a playground for the rich and famous, due to its tax laws. In 2014, it was noted about 30% of the population was made up of millionaires, more than in Zürich or Geneva.
Monaco is not formally a part of the European Union (EU), but it participates in certain EU policies, including customs and border controls. Through its relationship with France, Monaco uses the euro as its sole currency (prior to this it used the Monégasque franc). Monaco joined the Council of Europe in 2004. It is a member of the Organisation Internationale de la Francophonie (OIF).