Jim Walton, John Walton, Rob Walton, and Helen Walton clapping at a banquet
Jim Walton, John T. Walton, Rob Walton, and Helen Walton in 1997.
  • The US may not have royals, but it does have family empires worth billions.
  • They've accumulated fortunes in a variety of ways, including publishing, cosmetics, retail, and hotels.
  • See the top-25 richest families in the US, ranked by net worth, starting at roughly $12 billion. 

Billionaires' wealth has been growing exponentially over the past few years.