Vidattaltivu or Vidaththaltheevu (Tamil: விடத்தல் தீவு Vidaththal theevu,Tamil: Vidaththal theevu) is a coastal town in the Mannar District of northwest Sri Lanka. Vidattaltivu is the biggest town situated on Sri Lanka's North-Western coast (Jaffna lies on north coast) and was the major base of the Sea Tigers until recently.