Mġarr ix-Xini Tower (Maltese: Torri ta' Mġarr ix-Xini) is the largest of the coastal watchtowers that the Knights of Malta erected on the island of Gozo. It watches over the entrance to the bay of Mġarr ix-Xini, limits of Għajnsielem, which lies on Gozo's south-west coast. It was completed in 1661, a year after Grand Master Martin de Redin's death, and is the last of the De Redin towers that he had commissioned. Recently, Wirt Għawdex, a heritage NGO, restored the tower.