NEW YORK CITY: The latest Henley Global Citizens Report, which tracks private wealth and investment migration trends worldwide, published their list of cities with the highest number of resident millionaires or high net-worth individuals (HNWIs) with wealth valued at more than $1 million. New York takes the crown with 345,600 millionaires residing in the city, but is just one of six American cities in the top 20. Dubai and Abu Dhabi are two of the top five wealthiest cities in the Middle East.