Lontzen is a municipality located in the Belgian province of Liège. On January 1, 2006 Lontzen had a total population of 5,071. The total area is 28.73 km² which gives a population density of 177 inhabitants per km².
|• Mayor||Patrick Thevissen (PFF)|
|• Governing party/ies||PFF, Ecolo|
|• Total||28.73 km2 (11.09 sq mi)|
|• Density||200/km2 (510/sq mi)|
In the 19th century, a Low Franconian dialect was widely spoken in Lontzen.