Introduction
Commune in Wiltz, LuxembourgEsch-sur-Sûre Esch-SauerCommuneEsch-sur-Sûre Coat of armsMap of Luxembourg with Esch-sur-Sûre highlighted in orange, and the canton in dark redCoordinates: 49°54′40″N 5°56′05″E / 49.911°N 5.93467°E / 49.911; 5.93467Country LuxembourgCantonWiltzGovernment • MayorMireille WelterArea • Total51.26 km2 (19.79 sq mi) • Rank8th of 100Highest elevation529 m (1,736 ft) • Rank10th of 100Lowest elevation238 m (781 ft) • Rank46th of 100Population (2025) • Total3,279 • Rank53rd of 100 • Density63.97/km2 (165.7/sq mi)  • Rank91st of 100Time zoneUTC+1 (CET) • Summer (DST)UTC+2 (CEST)LAU 2LU0000802Websiteesch-sur-sure.lu Esch-sur-Sûre (French pronunciation: [ɛʃ syʁ syʁ], lit. 'Esch on Sûre'; Luxembourgish: Esch-Sauer, pronounced [ˌæʃˈzɑʊ̯ɐ] ⓘ; German: Esch-Sauer, pronounced [ˌɛʃˈzaʊɐ]) is a commune and small town in north-western Luxembourg, situated in the canton of Wiltz. At one point it was the second smallest commune by area in Luxembourg (after Remich), until Neunhausen and Heiderscheid were merged into it in 2011. As of 2025[update], the town of Esch-sur-Sûre, which lies in the north of the commune, has a population of 415. Esch-sur-Sûre dam and reservoir Esch-sur-Sûre is situated by the river Sauer, just east and downstream of the artificial Upper Sauer Lake. The town's prominent 10th Century castle, and the main part of the town below, sit on a spur of a land within a sharp meander of the river. The suffix to its name distinguishes Esch-sur-Sûre from the city of Esch-sur-Alzette, which is often known just as Esch. Immediately above the town, the river has been dammed to form a hydroelectric reservoir extending some 6 miles (10 km) up the valley. The Upper Sauer dam was built in the 1960s to meet the country's drinking water needs.