Largest Jail: Cook County Jail
The Cook County Jail, located on 96 acres in Cook County, Illinois, is the largest jail in the United States of America, housing approximately 9,000 men and women.
Smallest Jail: Sark Prison on Sark Island in Guernsey
Sark Prison on Sark Island in Guernsey is known as the world's smallest prison and, made up of stone and without windows, is still operating for jailbirds to be held overnight or for brief stays.
