Globally, Bill Gates is back on top after a four-year hiatus, reclaiming the title of world's richest person from telecom mogul Carlos Slim Helu of Mexico.
Eleven Thais made their way to the Billionaires 2014 list.
Gates saw his fortune rise by $9 billion in the past year to $76 billion, thanks to the rise in Microsoft's share price.
He's been the richest man in the world for 15 out of the last 20 years, according to Forbes.
The magazine this year found 1,645 billionaires with an aggregate net worth of $6.4 trillion, up from $5.4 trillion a year ago. Among them, 268 were new tenfigure fortunes, including 42 new women billionaires, another record. In total, there are 172 women on the Billionaires list, more than ever before and up from 138 last year.
Thanks to the tech boom, and strong stock market, the US once again leads the world with 492 billionaires, followed by China with 152 and Russia with 111. But wealth is spreading to new places. We found billionaires for the first time in Algeria, Lithuania, Tanzania and Uganda.