Pétange is a commune and town in south-western Luxembourg. It is part of the canton of Esch-sur-Alzette and is the fifth-most populous com…Pétange is a commune and town in south-western Luxembourg. It is part of the canton of Esch-sur-Alzette and is the fifth-most populous commune in Luxembourg, as well as the most populous without town status. Pétange lies at the borders with both Belgium and France.