The chart above shows the total net worth of each state's billionaires.  California and New York are the only states whose billionaires have a total net worth of over $500 billion.

The chart above shows the number of billionaires per 100,000 square miles (258,999 square kilometers) in each EU and US region.  The Northeastern US has nearly double the number of billionaires of the next best region and is the only region with more than five billionaires for every 10,000 square miles (25,900 square kilometers).

The chart above shows the number of billionaires per 100,000 square kilometers (38,610 square miles) in each EU region.  The Western EU has double the number of billionaires of the next best region and is the only region with more than one billionaire for every 10,000 square kilometers (3,861 square miles).

The chart above shows the number of billionaires per 100,000 square miles (258,999 square kilometers) in each US region.  The Northeast has many multiples the number of billionaires of any other region and is the only region with more than two billionaires for every 10,000 square miles (25,900 square kilometers).

The chart above shows the number of billionaires per 100,000 square miles (258,999 square kilometers) in each EU and US state.  Connecticut is the only state where there are more than three billionaires for every 1,000 square miles (2,590 square kilometers).

The chart above shows the number of billionaires per 100,000 square kilometers (38,610 square miles) in each EU state.  Cyprus is the only state where there are more than five billionaires for every 10,000 square kilometers (3,861 square miles).

The chart above shows the number of billionaires per 100,000 square miles (258,999 square kilometers) in each US state.  Connecticut is the only state where there are three billionaires for every 1,000 square miles (2,590 square kilometers).

The chart above shows the number of billionaires per 100,000 people in each EU and US region.  Half the regions in the EU and the US have more than one billionaire for every million residents.

The chart above shows the number of billionaires per 100,000 people in each EU region.  The Northern EU has more than double the billionaires per capita of the next best region.

The chart above shows the number of billionaires per 100,000 people in each US region.  The West barely ekes out the Northeast in billionaires per capita.