Roigheim (German pronunciation: [ˈʁɔʏk.haɪm] ⓘ) is a small municipality in Southwest Germany, in Heilbronn County, situated along the Seckach river.

With approximately 1,400 inhabitants, Roigheim is the smallest independent community in the German state (Bundesland) Baden-Württemberg.

Archeologists have found remains that date back to the Stone Age.

In 1287 the small village became part of the area of the duke of Hohenlohe and only in 1504 it was bequeathed to Württemberg.

The former continues to exist today as a factory for manufacturing insulation material for power plants with the name of Pucaro.

On 6 May 1946 there was the first election after the war but the people of Roigheim, still deeply rooted in traditional ideas, were not yet true democrats.

One story says that Roigheim comes from the Alemannic warrior Roho who is supposed to have settled what he then named Rohingen before 500.