In 1798, after French Revolutionary troops had overrun the German lands on the Rhine’s left bank, it was assigned to the Mairie (“Mayoralty”) of Monzingen.

Monzingen remained the seat of a Bürgermeisterei (“mayoralty”) within the newly formed Kreuznach district, to which Langenthal also belonged.

In the course of administrative restructuring in Rhineland-Palatinate after the Second World War, Langenthal found itself grouped into the Verbandsgemeinde of Bad Sobernheim.

The figures for the years from 1871 to 1987 are drawn from census data:[4] As at 30 September 2013, there are 99 full-time residents in Langenthal, and of those, 57 are Evangelical (57.576%), 29 are Catholic (29.293%) and 13 (13.131%) either have no religion or will not reveal their religious affiliation.

The municipality's arms might in English heraldic language be described thus: Gules a bend wavy between in dexter base a wheel spoked of six and in sinister chief a chapel, all argent.