The French Revolution brought the hitherto prevailing lordship arrangements to an end. Imperial Countess Marianne von der Leyen, during her flight before the French Revolutionary troops, sought shelter for a week at the Evangelical rectory. The County of Leyen was dissolved in 1801; likewise liquidated was the Duchy of Palatinate-Zweibrücken. The Palatinate was now French. Münchweiler became the seat of a "mairie" (“mayoralty”), belonging to which were also the villages of Steinbach, Haschbach, Nanzweiler and Dietschweiler. The village now lay in the Canton of Waldmohr, the Arrondissement of Saarbrücken and the Department of Sarre. After the Palatinate’s cession to the Kingdom of Bavaria in 1816, Glan-Münchweiler was administered by the "Landcommissariat" of Homburg. In 1920, after the First World War, the Saar passed to France. The Canton of Waldmohr, which belonged to the "Bezirksamt" of Homburg, and along with it the "Bürgermeisterei" (“Mayoralty”) of Glan-Münchweiler, was grouped into the Kusel district. In preparation for the Battle of France in the Second World War, the Organisation Todt built a Führer Headquarters in Glan-Münchweiler, called “Waldwiese” (“Glade”). It was, however, never used as such. Since then, the complex has been completely dismantled. Considerable changes arose from the 1969-1972 administrative restructuring in Rhineland-Palatinate. On 7 June 1969, the hitherto self-administering municipality of Bettenhausen was split away from the Kaiserslautern district, grouped into the Kusel district and merged with Glan-Münchweiler to form the new municipality of Glan-Münchweiler, which itself became the seat of a newly created "Verbandsgemeinde" in 1972, to which also belong Börsborn, Herschweiler-Pettersheim, Hüffler, Wahnwegen, Krottelbach, Langenbach, Quirnbach, Henschtal, Steinbach am Glan, Nanzdietschweiler, Rehweiler and Matzenbach. Glan-Münchweiler retains this form to this day.