The Indian Diaspora is one of the world’s largest overseas groupings. The Diaspora is considered India’s 30th state with over 30 million overseas Indians. This article outlines the main strands of its formation, from the first movement of indentured workers and subsequent phases of migration of skilled professionals to the West and of workers to the Persian Gulf. They remain the single–largest contributor of foreign exchange and development in the country. Understanding its formation is an essential step for studying the Diaspora and engaging with it. This article aims to do that.