Ordelafo Faliero de Doni (or Dodoni) (died 1117 in Zadar, Kingdom of Hungary) was the 34th Doge of Venice.

In 1105 the new Croatian king, Coloman of Hungary, enabled by the alliance to the Byzantine Emperor Alexios I Komnenos,[1] launched campaign against Venetians, and returned the northeastern Adriatic coast under the crown.

The Basilica of Saint Mark and the then Doge’s Palace escaped with relatively minor damage because of their stone and marble construction.

In 1110, Faliero fearing the rise of Pisan and Genoese trade in East, was engaged in an expedition to Syria to aid the crusaders, comprising 100 Venetian ships.

A peace treaty was then concluded, according to which Zadar devolved upon Venice, while Biograd, Šibenik, Trogir and Split remained in the Kingdom of Croatia in personal union with Hungary.