Regierungsbezirk Montabaur

Montabaur was one of the five "Regierungsbezirke" of Rhineland-Palatinate, Germany into which the newly founded state was divided until 1968. The others were: Rheinhessen (established 1946, seat in Mainz), Pfalz (established 1945, seat in Neustadt an der Weinstraße), Koblenz and Trier (both established by Prussia in 1816.
History.
"Regierungsbezirk" Wiesbaden, formed in 1866 as part of the Prussian province of Hesse-Nassau, had been divided by after the Second World War by the occupying powers as it lay astride a zone boundary. The majority of the "Regierungsbezirk" lay in the American Zone and became part of the state of Hesse in 1945. The "Regierungsbezirk" of Montabaur had to be created for the smaller northwestern part and became part of the state of Rhineland-Palatinate in 1946.
The "Regierungsbezirk" of Montabaur was dissolved on 1 October 1968 and incorporated into Koblenz. The area of "Regierungsbezirk" Montabaur largely corresponds to the modern counties of Rhein-Lahn-Kreis and Westerwaldkreis.
Former administrative divisions.
The "Regierungsbezirk" of Montabaur was divided into the counties of Oberwesterwaldkreis (Westerburg), Loreleykreis (Sankt Goarshausen), Unterlahnkreis (Diez) and Unterwesterwaldkreis (Montabaur).