10. Chicago, Illinois
> Billionaires residing in Chicago: 11
> Combined net worth of billionaires in city: $49.5 billion
> Wealthiest billionaire in city: Ken Griffin ($15 billion)
One of three hedge fund billionaires on this list, this 52-year-old CEO of Citadel, an investment firm he founded in 1990, three years after he began trading from his Harvard University dorm room using a fax machine and personal computer.
9. Palm Beach, Florida
> Billionaires residing in Palm Beach: 11
> Combined net worth of billionaires in city: $61.6 billion
> Wealthiest billionaire in city: Thomas Peterffy ($25.2 billion)
Born in Hungary in 1944, the rags-to-riches immigrant founder and chairman of Interactive Brokers, one of the largest and oldest electronic-trading platforms in the U.S., continues to head his Greenwich, Connecticut-based empire from his waterfront mansion in south Florida.
8. Atlanta, Georgia
> Billionaires residing in Atlanta: 12
> Combined net worth of billionaires in city: $55.1 billion
> Wealthiest billionaire in city: Jim Kennedy ($8.2 billion)
This 73-year-old media executive is a member of the Cox family, owner of privately held Cox Enterprises that owns a raft of media assets including AutoTrader, Kelley Blue Book and Cox Communications.
7. Austin, Texas
> Billionaires residing in Austin: 12
> Combined net worth of billionaires in city: $240.7 billion
> Wealthiest billionaire in city: Elon Musk ($168.6 billion)
The 49-year-old South African-born self-made entrepreneur who recently relocated to Austin, cofounded Tesla and founded aerospace manufacturer SpaceX, companies that have taken leads in the mass-production of electric cars and private, U.S.-based orbital-delivery rockets.
6. Houston, Texas
> Billionaires residing in Houston: 14
> Combined net worth of billionaires in city: $52.9 billion
> Wealthiest billionaire in city: Richard Kinder ($6.4 billion)
The 76-year-old self-made energy and pipeline executive cofounded and chairs Kinder Morgan, the largest energy infrastructure firm in the U.S.
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