Südharz is a municipality in the Mansfeld-Südharz district, Saxony-Anhalt, Germany. It was formed on 1 January 2010 by the merger of the former municipalities Agnesdorf, Bennungen, Breitenstein, Breitungen, Dietersdorf, Drebsdorf, Dittichenrode, Hainrode, Hayn, Kleinleinungen, Questenberg, Roßla, Rottleberode, Schwenda and Uftrungen. Wickerode and Stolberg were added in September 2010.