Below is a list of world's top 10 richest people according to Forbes. With net worth of US$85 billion, Microsoft founder Bill Gates is the richest person in the world as of February 2017. The eight of the world's 10 wealthiest people are American citizens.

Bill Gates 1. Bill Gates
Net worth: $85 billion (02/2017)
Source of wealth: Microsoft
Citizenship: USA
Born: October 28, 1955, Seattle
Spouse: Melinda Gates
Education: Harvard College, Harvard University, Lakeside School
Warren Buffett 2. Warren Buffett
Net worth: $75 billion (02/2017)
Source of wealth: Berkshire Hathaway
Citizenship: USA
Born: August 30, 1930, Omaha
Education: University of Nebraska Lincoln, Columbia University
Spouse: Astrid Menks (m. 2006), Susan Buffett (m. 1952–2004)
 jeffbezos 3. Jeff Bezos
Net worth: $72 billion (02/2017)
Source of wealth: Amazon.com
Citizenship: USA
Born: January 12, 1964
Education: Princeton University
Spouse: MacKenzie Bezos
Children: Three sons and one daughter
Amancio Ortega 4. Amancio Ortega
Net worth: $72 billion (02/2017)
Source of wealth: Inditex Group
Citizenship: Spain
Born: March 28, 1936, León, Spain
Spouse: Rosalia Mera (m. 1966–1986)
 MarkZuck 5. Mark Zuckerberg
Net worth: $56 billion (02/2017)
Source of wealth: Facebook
Citizenship: USA
Born: May 14, ‎1984
Education: Harvard University
Spouse: Priscilla Chan
Children: Maxima Chan Zuckerberg
Carlos Slim 6. Carlos Slim
Net worth: $52 billion (02/2017)
Source of wealth: Telmex, América Móvil, Grupo Carso
Citizenship: Mexico
Born: January 28, 1940, Mexico City
Education: National Autonomous University of Mexico
Spouse: Soumaya Domit Gemayel (1967–1999)
Children: Carlos Slim Domit, Soumaya Slim Domit, Vanessa Slim Domit, Johanna Slim Domit, Patrick Slim Domit, Marco Antonio Slim Domit.
Lawrence Ellison 7. Lawrence Ellison
Net worth: $51 billion (02/2017)
Source of wealth: Oracle Corporation
Citizenship: USA
Born: August 17, 1944, Manhattan
Spouse: Melanie Craft (2003–2010), Barbara Broothe (1983–1986), Nancy Wheeler Jenkins (1977–1978), Adda Quinn (1967–1974)
 bloomberg 8. Michael Bloomberg
Net worth: $45 billion (02/2017)
Source of wealth: Bloomberg L.P.
Citizenship: USA
Born: February 14, 1942
Education: Harvard University, Johns Hopkins University
Spouse: Susan Brown (1975–1993, divorced)
Children: Emma Bloomberg, Georgina Bloomberg
Ch Koch 9. Charles Koch
Net worth: $45 billion  (02/2017)
Source of wealth: Koch Industries, Inc.
Citizenship: USA
Education: Massachusetts Institute of Technology
Born: November 1, 1935, Wichita, Kansas
Spouse: Elizabeth B. Koch  (m. 1972)
D Koch 10. David Koch
Net worth: $45 billion  (02/2017)
Source of wealth: Koch Industries, Inc.
Citizenship: USA
Education: Massachusetts Institute of Technology
Born: May 3, 1940, Wichita, Kansas
Spouse: Julia Margaret Flesher (m. 1996)