The authoritative magazine released America's top 400 richest people.
Aggregate net worth totals $2.4 trillion with an average person from the list to own $6bln.
The minimum capital to get into list was $1,7bln.
More than 10% of the billionaires in the list are once immigrants to the United States - they came from 21 countries, including Israel, India, Hungary, Taiwan and Russia.
Here is the top ten of Forbes 400 list:
1. Bill Gates, $81bln
2. Jeff Bezos, $67bln
3. Warren Buffett, $65.5bln
4. Mark Zuckerberg, $55.5bln
5. Larry Ellison, $49.3bln
6. Michael Bloomberg, $45bln
7. Charles Koch, $42bln
7. David Koch, $42bln
9. Larry Page, $38.5bln
10. Sergey Brin, $37.5bln