[3] Clockwise from the north, Schmittweiler’s neighbours are Callbach, Finkenbach-Gersweiler, Waldgrehweiler (these last two lying in the neighbouring Donnersbergkreis), Becherbach and Reiffelbach, which all, but for those otherwise noted, likewise lie in the Bad Kreuznach district.

To distinguish itself from the outlying centre of Schönenberg-Kübelberg also known as Schmittweiler, the village once bore the official tag “Amtsgericht Lauterecken”.

The figures for the years from 1871 to 1987 are drawn from census data:[5] As at 31 January 2014, there are 198 full-time residents in Schmittweiler, and of those, 125 are Evangelical (63.131%), 44 are Catholic (22.222%), and 29 (14.646%) either have no religion or will not reveal their religious affiliation.

The following are listed buildings or sites in Rhineland-Palatinate’s Directory of Cultural Monuments:[7] Each year on 3 October, German Unity Day, Schmittweiler holds its Autumn Festival (Herbstfest) with a farmer's market.

This leads northwards out of the village down the Eschelbach valley to Callbach, where it links with Bundesstraße 420, 2 km away.