Currently, there are over 2,600 billionaires worldwide, and only a handful have amassed a fortune exceeding a billion USD before turning 30. Here are the top 9 self-made billionaires under 30 who have garnered attention for their contributions to the community. Self-made billionaires under 30 1. Mark Zuckerberg (USA) is a prominent billionaire on this list, he became a billionaire when he was only…