Weitersbach is an Ortsgemeinde – a municipality belonging to a Verbandsgemeinde, a kind of collective municipality – in the Birkenfeld district in Rhineland-Palatinate, Germany. It belongs to the Verbandsgemeinde Herrstein-Rhaunen, whose seat is in Herrstein.
The municipality lies on the Idarbach at the edge of the Idar Forest in the Hunsrück. The municipal area is 77.2% wooded.
Weitersbach borders in the north on the municipality of Laufersweiler (Rhein-Hunsrück-Kreis), in the northeast on the municipality of Gösenroth, in the southeast on the municipality of Rhaunen, in the southwest on the municipality of Stipshausen, in the west on the municipalities of Hochscheid (Bernkastel-Wittlich district) and Horbruch and in the northwest on the municipality of Krummenau.
Archaeological digs at several barrows within Weitersbach's limits have unearthed finely decorated ceramics, bronze weapons and pieces of jewellery. These are grave goods from the prevalent culture about the year 500 BC, when Celtic settlers of Early La Tène times used the favourable location on the Idarkopf's south slope as their dwelling and farming place. Finds of metal-bearing slag in the forest above the village also suggest that iron was being smelted here even in pre-Roman times.
Just under 2,000 years ago, at the grove known as the Kaisergarten, where the forest road to Krummenau and the ancient trade road “Strut” fork away from each other, stood one of the biggest estates of Roman times in the Hunsrück area. Among the buildings here, which were thoroughly excavated in 1953-1955, was the main building, a palacelike villa with a risalto, an ostentatious portico and corner turrets. This 26-room villa rustica had floor heating by hypocaust and a luxurious bathing wing with cold, lukewarm and hot baths. Near the main building stood drying ovens for grain and smoked foods: a clear hint that there were both extensive cropraising and significant livestock raising here.
In 1200, Weitersbach had its first documentary mention as Widemarsbach.