Hardheim is a municipality located in the district of Neckar-Odenwald-Kreis within the German state of Baden-Württemberg. The township's history dates back to at least 1050, which marks its first recorded mention in written form.
The municipality is composed of several constituent localities, including Hardheim, Ruedental, Schweinberg, Gerichtstetten, Erfeld, Bretzingen, Dornberg, Ruetschdorf, Vollmersdorf, and Breitenau. Additionally, the town maintains international ties through twinning agreements with Müntschemier in Switzerland and Suippes in France.