Peter Orseolo, or Peter the Venetian (Venice, 1010 or 1011 – 1046, or late 1050s), is King of Hungary twice.

He first succeeds his uncle, King Stephen I, in 1038.

However, his favoritism towards his foreign courtiers causes an uprising which ends with his 1041 deposition.

Peter is restored in 1044 by Henry III, Holy Roman Emperor.

He accepts the emperor's suzerainty during his second reign, which ends in 1046 after a pagan uprising.

Hungarian chronicles are unanimous that Peter was executed by order of his successor, Andrew I, but the chronicler Cosmas of Prague's reference to his alleged marriage around 1055 suggests that he may also have survived his second deposition.