Houffalize (German: Hohenfels) is a Walloon municipality of Belgium located in the province of Luxembourg. On 1 January 2007 the municipality, which covers 166.58 square kilometres (64.32 sq mi), had 4,802 inhabitants, giving a population density of 28.8 inhabitants per km².

The municipality consists of the following sub-municipalities: Houffalize proper, Mabompré, Mont, Nadrin, Tailles, Tavigny, and Wibrin. Other population centers include Achouffe, Alboumont, Bœur, Bonnerue, Buret, Cetturu, Chabrehez, Cowan, Dinez, Engreux, Filly, Fontenaille, Mormont, Ollomont, Pisserotte, Sommerain, Taverneux, Vellereux, Vissoûle, Wandebourcy, and Wilogne.

Houffalize was a strategic location during the Battle of the Bulge of World War II. Specifically, Generals Montgomery and Patton met up here, Montgomery coming from the north and Patton from the south, in their counter-attack against the German forces remaining in the area.