 Merzweiler belonged to this district until 1937, when it was transferred to the Birkenfeld district, formed out of the "Restkreis" and a formerly Oldenburg-held district, also called Birkenfeld.This new, bigger Birkenfeld district lay within the Prussian "Regierungsbezirk" of Koblenz.After the Second World War, the village at first lay within the "Regierungsbezirk" of Koblenz in the then newly founded state of Rhineland-Palatinate.