MONTEREAU, or MONTEREAU-FAUT-YONNE, a town of France, in the department of Seine-et-Marne, is situated at the confluence of the Yonne and the Seine, 12 miles E. of Fontainbleau. It is divided into three parts by the two rivers, which are crossed by bridges, the largest part lying on the left bank of the Yonne. The town is for the most part well built, and has a collegiate church, an hospital, and a town-hall. Manufactures of hosiery, leather, and earthenware are carried on, and there is a considerable trade with Paris in grain, timber, cattle, &c. MonterEAU is remarkable in history for the murder of the Duke of Burgundy at the bridge over the Seine in 1419, and for the last victory of Napoleon, February 18, 1814. Pop. 4826.