'Ladislaus I' (sometimes spelled 'Władysław I') may refer to:
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Ladislaus I of Hungary (1040-1095), King of Hungary
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Władysław I Herman (1040-1102), Duke of Poland
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Władysław II the Exile (1138-1146), Duke of Silesia, sometimes known as ''Ladislaus I the Exile''
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Ladislaus I of Opole (1246-1281), Duke of
Opole
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WÅ‚adysÅ‚aw I the Elbow-high (1261-1333), King of Poland (also known as ''Ladislaus the Short'', or ''WÅ‚adysÅ‚aw I Åokietek'')
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Wladislaus I of Oswiecim (c.1314 - c. 1321), Duke of
Oświęcim
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Vladislav I of Wallachia (1364 - c. 1377) Prince of Wallachia (also known as ''Vlaicu-Vodă'')
See also
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Ladislaus (disambiguation page)
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Ladislaus I of Poland (disambiguation)