The Mehaigne is a river in Belgium. It is a left tributary to the Meuse. Its source is at La Bruyère, in the province of Namur, at an elevation of 180 metres (590 ft).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 85 metres (279 ft).