Heidenheim (German pronunciation: [ˈhaɪdn̩ˌhaɪm] ⓘ) is a market town in central-western Bavaria, Germany.

Heidenheim includes the local subdistricts of Degersheim, Hechlingen am See, and Hohentrüdingen.

[3] Secular power was represented in turn by the Earl of Truhendingen (Altentrühdingen), the Duke of Bavaria, and the Hohenzollern burgrave of Nuremberg.

In 1792, Prussia bought the Principality of Ansbach, bringing Heidenheim under Prussian rule.

As part of Ansbach, Heidenheim was transferred back to Bavaria due to the Treaty of Paris (1806) [de].