The Aubetin is a long river in the Marne and Seine-et-Marne départements, northeastern France. Its source is at Les Essarts-le-Vicomte, northeast of Nogent-sur-Seine. It flows generally west-northwest. It is a left tributary of the Grand Morin into which it flows at Pommeuse, west of Coulommiers. Communes along its course This list is ordered from source to mouth: Marne: Les Essarts-le-Vicomte, Bouchy-Saint-Genest, Seine-et-Marne: Louan-Villegruis-Fontaine, Villiers-Saint-Georges, Augers-en-Brie, Cerneux, Courtacon, Beton-Bazoches, Frétoy, Dagny, Amillis, Beautheil, Saints, Mauperthuis, Saint-Augustin, Pommeuse, References Rivers of France Rivers of Marne (department) Rivers of Seine-et-Marne Rivers of Grand Est Rivers of Île-de-France