Fontainebleau is a commune in the metropolitan area of Paris, France. It is located 55.5 kilometres south-southeast of the centre of Paris. Fontainebleau is a sub-prefecture of the Seine-et-Marne department, and it is the seat of the arrondissement of Fontainebleau. The commune has the largest land area in the Île-de-France region; it is the only one to cover a larger area than Paris itself.
Fontainebleau, together with the neighbouring commune of Avon and three other smaller communes, form an urban area of 39,713 inhabitants. This urban area is a satellite of Paris.
Fontainebleau is renowned for the large and scenic forest of Fontainebleau, a favourite weekend getaway for Parisians, as well as for the historic Château de Fontainebleau, which once belonged to the kings of France. It is also the home of INSEAD, one of the world's most elite business schools; of the École supérieure d'ingénieurs en informatique et génie des télécommunications, one of France's grandes écoles; and of a branch of the École nationale supérieure des mines de Paris, the Paris School of Mines, also one of the elite grandes écoles.
Inhabitants of Fontainebleau are called Bellifontains.