Esch-sur-Alzette (Luxembourgish: Esch-Uelzecht pronounced [ˌæʒ ˈuəltsəɕt] (listen), German: Esch an der Alzette [ˌɛʃ ʔan deːɐ̯ ʔalˈzɛt] or Esch an der Alzig, French: Esch-sur-Alzette) is a commune with city status in south-western Luxembourg, capital of the canton Esch-sur-Alzette.
The town is usually referred to just as Esch, but there is also a village and commune further north, in the Wiltz canton, named Esch-sur-Sûre from which to distinguish it.