The Lomme, Lhomme or L'Homme is a river in the Ardennes, in the Walloon region of Belgium.

It passes through the villages of Poix-Saint-Hubert, Smuid, Mirwart, Grupont, Lesterny, Forrières, Jemelle, and the town of Rochefort, where it carved the Lorette cave.

It has one of the greatest drops in elevation of all rivers in Belgium.

Its clear waters are home to a large population of fish, and the river is a popular location for trout fishing.

This article related to a river in Belgium is a stub.