Listed are the heads of state and government by their net worth, generally entered in U.S. dollars for simple comparison purposes, with former heads of state

Head of State

A head of state is the individual that serves as the chief public representative of a monarchy, republic, federation, commonwealth or other kind of state. His or her role generally includes legitimizing the state and exercising the political powers, functions, and duties granted to the head of...

 and government

Head of government

Head of government is the chief officer of the executive branch of a government, often presiding over a cabinet. In a parliamentary system, the head of government is often styled prime minister, chief minister, premier, etc...

 listed separately from current incumbents.

It should be disclosed that there are issues with converting the net worth of various individuals from around the world to a single currency, notably ignoring the buying power and standard of living in a person's native country that could inflate or deflate the real value of his net worth relative to others upon this list.