Fléron is a Walloonmunicipality located in the Belgian province of Liège. On January 1, 2006, Fléron had a total population of 16,088. The total area is 13.72 km2 (5 sq mi) which gives a population density of 1,172 inhabitants per km². Fléron is west of the city of Liège.
The municipality of Fléron consists of the village of Fléron and the villages (also subdivisions) of Retinne, Magnée and Romsée.
The reminders of Fort de Fléron are in the center of the village of Fléron.