Zuckerberg is joined on the list by fellow Facebook co-founders Dustin Moskovitz, who claimed the second place on the list with an estimated net worth of $9.3 billion and Eduardo Saverin who was ranked fourth with an estimated net of $5.3 billion.
The top-20 list features only six women. Huiyan Yang, the 34-year-old Vice Chairman of Chinese real estate developer Country Garden Holdings, is the richest woman on the list, taking the third spot with an estimated net of $5.9 billion, as per Wealth-X, the global wealth intelligence and prospecting company.
The top-10 wealthiest individuals under the age of 35 also include Scott Duncan at the fifth position with a wealth of $5 billion, Elizabeth A Holmes (6th, $4.5 billion), Nathan Blecharczyk (7th, $3 billion), Brian Chesky (8th, $3 billion), Joe Gebbia (9th, $3 billion) and Thomas Persson (10th, $2.7 billion).
As many as 11 of the world's top 20 wealthiest individuals under the age of 35 are from the US, while three each are from China (including Hong Kong) and Switzerland. However, no Indian featured on the list.
The youngest individual on the list is Snapchat Chief Executive Evan Spiegel, who at the age of 25 has amassed a fortune of $1.9 billion.
Wealth-X provides insight into the ultra-wealthy with the world's largest collection of curated research on ultra high net worth individuals.