Indians living in the U.S.: 2 million
A Washington Post article reports that "Roughly 2 million nonresident Indians, or NRIs, as they are known [in India], live in the United States, according to the Ministry of Overseas Indian Affairs in New Delhi. Worldwide, NRIs send home more than $30 billion a year, making up about 3 percent of India's gross domestic product, the International Labor Organization estimates."