Lierneux is a municipality of Belgium. It lies in the country's Walloon Region and Province of Liege. On January 1, 2006, Lierneux had a total population of 3,367. The total area is 92.08 km² which gives a population density of 37 inhabitants per km². Lierneux is known for its psychiatric hospital CHS l'Accueil.
The municipality consists of the following sub-municipalities: Lierneux proper, Arbrefontaine, and Bra.
Within the bounds of the municipality a lies a memorial site to the tribute of the 82nd Airborne Division who won the Battle of the Bulge against the German SS division December 22, 1944.
- Hendriks, Jan (1995). A Hell in the Snow the Battle Near Grand Sart (Lierneux) on January 7th 1945. Birds Nest Books (Missoula, MT, U.S.A.).
- Media related to Lierneux at Wikimedia Commons