Top 10 Youngest Billionaire in America in 2013 -Top 20 Youngest Billionaire in America in 2013

Net Worth              : $1.4 billion
Known for              : Co-founder of Facebook
Age                          : 26

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No.2 Mark Zuckerberg Net Worth              : $6.9 billion
Known for              : Co-founder of Facebook
Age                          : 26 (May 14, 1984)

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No.3 Scott Duncan Net Worth              : $3.1 billion
Known for              :  pipelines(energy)
Age                         : 27

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No.4 Eduardo Saverin Net Worth              : $1.15 billion
Known for              : Co-founder of Facebook
Age                          : 28(May 22, 1984)

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No.5 John Arnold Net Worth              : $3.3 billion
Known for              :  hedge funds- natural gas trading
Age                          : 36

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No.6 Sergey Brin  Net Worth              : $15 billion
Known for              : Russian American computer scientist and co-founded Google Inc
Age                          : 37 (August 21, 1973)

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No.7 Larry Page Net Worth              : $15 billion
Known for              : computer scientist and co-founded Google Inc
Age                          : 37 (March 26, 1973)

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No.8 Daniel ZiffNet Worth: $4 billion Source: inheritance, hedge funds
Age: 38

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No.9 Lorenzo FertittaNet Worth: $1 billion Source: casinos, Ultimate Fighting Championship
Age: 41

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No.10 Jerry Yang Net Worth: $1.15 billion
Source: Yahoo
Age: 41
Top 10 Youngest Billionaire in America in 2013 -Top 20 Youngest Billionaire in America in 2013