Grâce-Hollogne (French pronunciation: [ɡʁas ɔlɔɲ]; Walloon: Gråce-Hologne) is a municipality of Wallonia located in the province of Liège, Belgium.

Grâce-Hollogne was formed by the grouping of former municipalities Bierset, Grâce-Berleur, Hollogne-aux-Pierres, Horion-Hozémont, and Velroux, along with part of Mons-lez-Liège.

The killing of four demonstrators on 30 July 1950 in Grâce-Berleur[2] was one of the most significant moments in the so-called Royal Question of 1950, which grew out of resentment towards King Leopold III and his actions in World War II.

In June 1995 it was from Grâce-Hollogne that Julie Lejeune and Mélissa Russo were infamously abducted to become victims of the notorious serial killer and child molester Marc Dutroux.

[5] Avient Aviation has its Continental Europe offices on the property of Liège Airport.