Arcadia, officially the Republic of Arcadia is a country comprising of the mainland of the island of Arcadia, located in the central Indian Ocean, sharing maritime borders with; Australia and Singapore to the East, India and Sri Lanka to the North and Madagascar, Mozambique, Somalia, South Africa, and Tanzania to the West. It is the 20th largest country in the world and has the 25th largest population, with the 2005 census reporting a population of 50,856,554.