The publication has published its famous list every year for 31 years; 2017 was the first Forbes' reported more than 2,000 billionaire fortunes worldwide.
This year saw 15 new self-made women join the list, 14 from Asia pacific and one woman, Thai Lee, who was born in Thailand, but moved to the USA as a child.
Irsay, 57, saw his net worth rise from $2.3 billion to $2.5 billion, but his position on the list dropped from 771st to 814th.
The total combined net worth of this year's billionaires was $7.67 trillion, up from $6.48 trillion last year.
Microsoft founder and philanthropist Bill Gates topped the list for the fourth time in a row with a net worth of $112 billion.
Forbes says it calculates the wealth of the listed billionaires by using stock prices and exchange rates to calculate their net worth as of February 17, 2017.
"Booming stock markets, higher commodities prices and plain old-fashioned entrepreneurship helped make this a record year in terms of wealth creation around the globe", said Luisa Kroll and Kerry Dolan, Assistant Managing Editors of Wealth at Forbes Media.
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Joining them in the top five were Berkshire Hathaway founder Warren Buffet ($75.6 billion), Amazon head honcho Jeff Bezos ($72.8 billion), and Spanish business tycoon Amancio Ortega ($71.3 billion). He ranks No. 544 on the list, with a net worth $3.5 billion.
Mark Zuckerberg: Facebook's co-founder, CEO and chairman holds a current net worth of $58.6 billion.
A recent breakdown of the president's wealth valued his New York City real estate at $1.7 billion, his real estate outside New York at $630 million, his golf clubs at $620 million, his cash and personal assets at $270 million, and his brand businesses at $230 million.
Southeast Asia was home to the most billionaires at 720, Forbes said. 238 inherited their wealth; another 434 inherited at least a portion but are still growing it. "What happens in that micromarket does more to affect the net worth of Donald Trump than anything else in the world".
Forbes said the $1bn fall in his wealth was due to the slow United States property market.
China was second with 319 billionaires, and Germany was third with 114.