Those wealthy individuals are a small part of the richest 1% of the population, which combined owns about 46% of global wealth, according to the report from British humanitarian group Oxfam International.
The study found the richest 1% had $110 trillion in wealth --- 65 times the total wealth of the bottom half of the population.
That bottom half of the population owned about $1.7 trillion, or about 0.7% of the world's wealth. That's the same amount as owned by the 85 richest people, the report said.
The findings undermine democracy and make it more difficult to fight poverty, the report said.
"It is staggering that in the 21st century, half of the world's population own no more than a tiny elite whose numbers could all sit comfortably in a single train carriage," said Winnie Byanyima, the group's executive director.
Oh, and happy Martin Luther King Day.