With the partition of the “Hinder” County of Sponheim in 1776, Irmenach ended up, as did the whole "Oberamt" of Trarbach, with the House of Palatinate-Birkenfeld, until eventually the County ceased to exist with the French conquest in 1794. Beginning in 1815, Irmenach belonged to Prussia and was grouped into the Mayoralty of Büchenbeuren in the newly formed district of Zell. After that district's dissolution in 1969, Irmenach belonged for a short time to the Rhein-Hunsrück-Kreis. When the "Verbandsgemeinde" of Büchenbeuren was also dissolved in 1970, with a foreseen merger of the whole entity into the "Verbandsgemeinde" of Kirchberg, the two municipalities of Irmenach and Beuren managed to have themselves, with effect from 7 November 1970, transferred to the newly formed "Verbandsgemeinde" of Traben-Trarbach in the Bernkastel-Wittlich district. By decree of the "Regierungsbezirk" government in Trier, from 30 October 1974, the two until then self-administering municipalities of Irmenach and Beuren were dissolved and merged into a single one. The double name “Irmenach-Beuren”, however – used by almost all the municipality's clubs – was not adopted as the new municipality's name as well.