It belongs to the Verbandsgemeinde Simmern-Rheinböllen, whose seat is in Simmern.

The municipality lies in the Hunsrück on the northwest slope of the Simmerbach valley, roughly 8 km northeast of Simmern and 7 km northwest of Rheinböllen.

Beginning in 1794, Steinbach lay under French rule.

Since 1946, it has been part of the then newly founded state of Rhineland-Palatinate.

What follows is a table of the municipality's population figures for selected years since the early 19th century (each time at 31 December): The council is made up of 6 council members, who were elected by majority vote at the municipal election held on 7 June 2009, and the honorary mayor as chairman.