The Mehaigne () is a river in Belgium. It is a left tributary to the Meuse. Its source is at Saint-Denis (La Bruyère), in the province of Namur, at an elevation of . The Mehaigne flows in a roughly eastern direction through a region called Hesbaye. It flows into the river Meuse in the municipality of Wanze at an elevation of . Rivers of Belgium Rivers of Namur (province) Rivers of Limburg (Belgium) Rivers of Liège Province