Since the mass immigration some 100 years ago, Jews have become richest religious group in American society. They make up only 2% of US population, but 25% of 400 wealthiest Americans.
The online Jewish Encyclopedia says some 5.6 million Jews live in the United States (not including half a million Israelis) – about 1.8% of the population. Most of them reside in rich cities: Miami, Los Angeles, Philadelphia and Boston, and mainly New York.
A study of the Pew Forum institute from 2008 found that Jews are the richest religious group in the US: Forty-six of Jews earn more than $100,000 a year, compared to 19% among all Americans. Another Gallup poll conducted this year found that 70% of American Jews enjoy "a high standard of living" compared to 60% of the population and more than any other religious group.