Ladislaus I

Ladislaus I (also spelled Vladislav I or Władysław I) may refer to:

• Ladislaus I of Hungary (1040–1095), King of Hungary
• Ladislaus I Herman (1040–1102), Duke of Poland
• Vladislaus I, Duke of Bohemia ({{circa|1065}}–1125), Duke of Bohemia
• Władysław II the Exile (1105–1159), Duke of Silesia, sometimes known as Ladislaus I the Exile
• Vladislaus II, Duke of Bohemia ({{circa|1110}}–1174), who reigned as King Vladislaus I of Bohemia
• Vladislav I of Serbia, King of Serbia (1234–1243)
• Ladislaus I of Opole (1246–1281), Duke of Opole
• Wladislaus I of Oswiecim ({{circa|1314}} – {{circa|1321}}), Duke of Oświęcim
• Władysław I the Elbow-high (1261–1333), King of Poland (also known as Ladislaus the Short, or Władysław I Łokietek)
• Vladislav I of Wallachia (died 1377), Prince of Wallachia (also known as Vlaicu-Vodă)
• Ladislaus I of Naples (1377–1411), King of Naples