In terms of absolute number of incarcerated persons, though, the US is ahead of everyone else by a country mile. Depending on which inmate pools you include or exclude, the US holds 20-25% of all incarcerated persons in the world.

https://en.wikipedia.org/wiki/Incarceration_in_the_United_St...

https://en.wikipedia.org/wiki/United_States_incarceration_ra...