Conrad III or Konrad III may refer to:
Conrad I of Burgundy (c. 925 – 993), numbered Conrad III in his family Conrad III, Duke of Bavaria (1052–1055) Conrad III, Duke of Carinthia (died 1061) Conrad III of Germany (1093–1152) Conrad III of Dachau (died 1182) Conrad of Wittelsbach (died 1200), archbishop of Salzburg as Conrad III Konrad III of Laichling (died 1204), bishop of Regensburg Conrad III of Scharfenberg (died 1224), bishop of Speyer Conrad III of Jerusalem (1252–1268) Conrad of Lichtenberg (died 1299), bishop of Strasbourg as Conrad III Conrad III Zoellner of Rotenstein (died 1390) Konrad III the Old (died 1412), duke of Oleśnica (died 1424), Count of Freiburg Conrad III of Dhaun (died 1434) Konrad III Rudy (died 1503) Conrad III Schetz (died 1632)