From the Wikipedia page [1]
The Donnersbergkreis is a district (Kreis) in the middle of Rhineland-Palatinate, Germany. Neighboring districts are Bad Kreuznach, Alzey-Worms, Bad Dürkheim, Kaiserslautern, Kusel.
The district was created in 1969 by merging the districts Kirchheimbolanden and Rockenhausen.