- Data on Indian diaspora varies slightly between sources and definitions (NRI vs. PIO vs. total community). - According to estimates from various sources, including the Ministry of External Affairs and United Nations data around 2018-2019, the total Indian diaspora population in the USA was the largest globally, exceeding 4 million. - The United Arab Emirates also has a very large Indian population, particularly a high number of NRIs, often ranking first or second depending on the category.