Lech Kozik
Lech Kozik voted up Don Barzini's answer

The US has by far the largest number of prisons (4575); as well as the most prison inmates (2.2 million)---unless you count North Korea, which IS a prison of 25 million inhabitants. 

Saudi Arabia is currently executing more people as a function of its penal system than any other sovereign country. Other entities such as Boko … Read more