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2. New York-White Plains-Wayne (NY-NJ)

Population: 11.5 million
Diversity index: 80.1

New York City, one of the original entry points for many European immigrants, is one of the biggest melting pots in the world, with more than 800 languages spoken here. More than one third of the city’s residents were born outside the U.S. The biggest countries of origin include the Dominican Republic, China, Jamaica, Mexico and Haiti, though there are significant African-American, Italian, Irish and Jewish populations. New York is home to the United Nations and some of the best food from all over the world, including Italian, Greek and Egyptian. On any given weekend in the spring, summer and fall, you’ll find a different cultural festival or street fair, including the Puerto Rican Day Parade, the West Indian Day Parade, the Feast of San Gennaro and the Brazilian Day festival.

Photo: Gavin Hellier | Photographer's Choice | Getty Images