Dietwiller (; ) is a commune in the Haut-Rhin department in Alsace in eastern France. It forms part of the Mulhouse Alsace Agglomération, the inter-communal local government body for the Mulhouse conurbation.

History The Thalbahn Habsheim ran through Dietwiller. It was a long narrow-gauge railway with a gauge of . It was built during World War I by German soldiers and Romanian prisoners of war as a military light railway. Many prisoners of war died due to malnutrition, forced labor and the poor living conditions and were buried in the Romanian cemetery in Dietweiler.Paul Erhart: Histoire du chemin de fer militaire reliant la Hardt à Altkirch pendant la guerre 1914-18…

See also Communes of the Haut-Rhin department

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