The Dommel is a river in Belgium and The Netherlands, left tributary of the Dieze. It rises in north-eastern Belgium near Peer and flows into the southern part of the Netherlands. The Dommel takes in water from the Keersop, Tongelreep, Gender and Kleine Dommel streams and merges at 's-Hertogenbosch with the Aa stream to form river Dieze, which subsequently flows towards the Meuse.