Roeser is a commune and small town in southern Luxembourg. It is part of the canton of Esch-sur-Alzette. As of 2023 the commune had a population of 6,657. As of 2024, the town of Roeser, which lies in the north of the commune, has a population of 1,281. Other towns within the commune include Berchem, Bivange, Crauthem, Kockelscheuer, Livange, and Peppange.