The Mahâ Adigâr was a Great Officer in the Amātya Mandalaya, or Sinhalese Council of State, in the Sinhalese Kingdoms of monarchical Sri Lanka. The office was second in power and dignity to the King.

The Sinhalese monarchy has its origins in the settlement of North Indian Indo-Aryan immigrants to the island of Sri Lanka. The Landing of Vijay as described in the traditional chronicles of the island