There are 115 Jails & Prisons in Montana, serving a population of 1,029,862 people in an area of 145,509 square miles. There is 1 Jail & Prison per 8,955 people, and 1 Jail & Prison per 1,265 square miles.
The state of Montana is ranked 5th in Jails & Prisons per capita, and 50th in Jails & Prisons per square mile.