The municipality lies on Bundesstraße 270, in a side valley of the Upper Nahe, between the Palatinate and the Hunsrück.

Oberreidenbach lies right at the edge of one of Germany's biggest military drilling grounds, the Truppenübungsplatz Baumholder, which for decades has been used mainly by the Bundeswehr and the United States Army.

[1] The municipality's arms might be described thus: Per pale gules a fess between in chief a lion's head sinister erased and in base an oakleaf slipped palewise, all argent, and countercompony azure and Or.

Oberreidenbach has two small grocer's shops, a bakery and a commercial area with a company in mechanical engineering, a nursery, a swimming pool builder and a car dealership.

There is also a new residential development zone called Auf dem Rain with a children's playground, a sport ground and a small playing field with plastic covering.