More than a third of the 1,826 billionaires on Forbes' list live in 20 major cities worldwide. With 78, New York City has more than any other.

Asia's wealth boom has boosted the numbers of billionaire residents in the Chinese mainland, Hong Kong, India and South Korea.

With 64 billionaire residents, Asia's financial hub Hong Kong has almost caught up with Moscow and already surpassed London. Beijing is not far behind with 45, making it the top spot for wealth in the Chinese mainland. India's Mumbai and South Korea's Seoul follow with 33 and 29 billionaires respectively, as both countries significantly increased their share this year.

Now let's take a look at the top 10 cities with most billionaires this year.