King of Thailand
Net worth: $30 billion

As of 2009, King Bhumibol Adulyadej had a fortune worth USD 30 billion thus making him the richest head of state on the planet. Termed as a demigod in his own country, the King of Thailand’s personal fortune is massive with stakes in several private companies including Sammakorn, SCG and Thai Insurance PLC. In 2008, Forbes estimated that Adulyadej was worth USD 35 billion, but declines in real estate and stocks meant the figure had dipped USD 5 billion by the following year.