Bezos is "the first person to top $100 billion as number one on the Forbes list of the World's Billionaires," the magazine said.
Philanthopist and Microsoft founder Bill Gates is second ($90 billion), investment guru Warren Buffet third ($84 billion), Bernard Arnault and family fourth ($72 billion), and Facebook founder-CEO Mark Zuckerberg fifth ($71 billion).
US President Donald Trump is valued at $3.1 billion.
Indian industry titan Mukesh Ambani, the chairman of Reliance Industries Limited, is 19th on the list. He's valued at $40.1 billion.
Ambani was ranked 20th last year. His wealth has grown by over 8 billion dollars.
The other Indians (this includes people of Indian origin) on the list include:
The Hinduja family ($19.5 billion)
Wipro Chairman Azim Premji ($18.8 billion)
Steel magnate Lakshmi Mittal ($18.5 billion)
HCL founder Shiv Nadar ($14.6 billion)
Sun Pharma founder Dilip Shanghvi ($12.8 billion)
Aditya Birla Group Chairman Kumar Birla ($11.8 billion)
Kotak Mahindra Executive Vice-Chairman and MD Uday Kotak ($10.7 billion)
Investor Radhakishan Dhamani ($10 billion)
Serum Institute of India founder Cyrus Poonawalla ($9.1 billion)
Savitri Jindal and family ($8.8 billion)
Sunil Mittal and family ($8.8 billion)
Patanjali CEO Acharya Balkrishna ($6.3 billion)
Eicher Motors CEO Vikram Lal ($6.3 billion)
Wadia Group Chairman Nusli Wadia ($6.2 billion)
Shree Cement chairman Benu Gopal Bangur ($6 billion)
Amavardhan Motherson Group chief Vivek Chaand Sehgal ($6 billion)
Media baron Kalanithi Maran ($5.2 billion)
Essel Group Chairman Subhash Chandra ($5 billion)
Cadila Healthcare Chairman Pankaj Patel ($5 billion)
LuLu Group International Chairman and MD MA Yusuff Ali ($ 5 billion)
Piramal Group chief Ajay Piramal ($4.9 billion)
Bajaj Group's Niraj, Madhur and Shekhar Bajaj ($4.8 billion)
MAJORITY OF BILLIONAIRES MEN
The Forbes list was dominated by male public figures. In fact, all of the top ten billionaires were men.
With a fortune of $46 billion, Alice Walton, the American heiress to the Walmart empire, is the highest ranked woman (16th) in the list. Others include L'Oréal chief Francoise Bettencourt Meyers, BMW co-owner Susanne Klatten, and Mars co-owner Jacqueline Mars.