The United States has the highest documented incarceration rate in the world, says Wikipedia.
The USA also has the highest total documented prison and jail population in the world.[1][4][5]
2,304,115 people were incarcerated in U.S. prisons and jails in 2008.[3][7] In addition, according to a December 2009 BJS report, there were 92,854 held in juvenile facilities.