Ladislaus or Ladislav is a name of Slavic origin.
Ladislaus may also refer to:
- Ladislaus I of Hungary (1040–1095), King of Hungary and saint
- Ladislaus II of Hungary (1131–1163), king
- Ladislaus III of Hungary (1199–1205), king
- Ladislaus IV of Hungary (1262–1290), king
- Ladislaus the Posthumous or Ladislaus V of Hungary (1440–1457), also King of Bohemia
- Ladislaus of Naples (1377–1414), King of Naples
- Wenceslaus III of Bohemia (1289–1306), who took the name Ladislaus when he was crowned King of Hungary in 1301