The jury found the Palestinian Authority (PA) and the Palestine Liberation Organisation (PLO) liable on 25 separate charges and awarded the damages after one day of deliberations in a New York court.
Eleven plaintiff families filed suit in federal court against both the PA and the PLO following the attacks that killed 33 people and injured more than 390 others.
The plaintiffs had pressed for the PA and the PLO to be held accountable for supporting the attacks carried out by members of the Islamist movement Hamas and the Al-Aqsa Martyrs' Brigades, some of whom were also on the entities' payroll.