Wait, does the United States have 1.4 million or more than 2 million people in prison? Are most people in state and federal prisons locked up for drug offenses? Frustrating questions like these abound because our systems of confinement are so fragmented and controlled by various entities. There is a lot of interesting and valuable research out there, but varying definitions make it hard -- for both people new to criminal justice and for experienced policy wonks -- to get the big picture.This report offers some much needed clarity by piecing together this country's disparate systems of confinement. The American criminal justice system holds more than 2.3 million people in 1,719 state prisons, 102 federal prisons, 942 juvenile correctional facilities, 3,283 local jails, and 79 Indian Country jails as well as in military prisons, immigration detention facilities, civil commitment centers, and prisons in the U.S. territories. And we go deeper to provide further detail on why convicted and not convicted people are locked up in local jails.