- Who
- King Maha Vajiralongkorn
- What
- 30,000,000,000 US dollar(s)
- Where
- Thailand ()
- When
- 2018
The richest individual monarch is King Maha Vajiralongkorn (Rama X) of Thailand with an estimated personal wealth of at least $30 billion (£22.4 billion). His asset portfolio had been the property of the crown (as an institution, rather than the sovereign), but Vajiralongkorn was given control of the privy purse in 2018.