Ostholstein-Mitte is an Amt ("collective municipality") in the district of Ostholstein, in Schleswig-Holstein, Germany. It is situated north of Neustadt in Holstein. The seat of the Amt is the village Schönwalde am Bungsberg. The Amt Ostholstein-Mitte consists of the following municipalities (population in 2005 between brackets): Altenkrempe (1,121) Kasseedorf (1,587) Schashagen (2,502) Schönwalde am Bungsberg* (2,557) Sierksdorf (1,591) Ämter in Schleswig-Holstein