Rhineland
In 1946, the Rhineland was divided into the newly founded states of Hesse, North Rhine-Westphalia, and Rhineland-Palatinate. North Rhine-Westphalia is one of the prime German industrial areas, containing significant mineral deposits, (coal, lead, lignite, magnesium, oil, and uranium) and water transport. In Rhineland-Palatinate agriculture is more important, including the vineyards in the Ahr, Mittelrhein, and Mosel regions.
Wiesweiler
After the Second World War, the village lay at first within the "Regierungsbezirk" of Koblenz in the then newly founded state of Rhineland-Palatinate. In the course of administrative restructuring in Rhineland-Palatinate in 1968, the "Amt" of Grumbach was dissolved. Wiesweiler passed in 1972 to the then newly founded "Verbandsgemeinde" of Lauterecken, and at the same time also from the "Regierungsbezirk" of Koblenz to the newly founded "Regierungsbezirk" of Rheinhessen-Pfalz (the system of "Regierungsbezirke" in Rhineland-Palatinate has since been abolished).