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Grâce-Hollogne is a municipality located in the Belgian province of Liège. On January 1st, 2004 Grâce-Hollogne had a total population of 21,812 (10,552 males and 11,260 females). The total area is 34.24 km² which gives a population density of 637.06 inhabitants per km².fr:Grâce-Hollogne nl:Grâce-Hollogne