How much do states spend on prisoners?

States incarcerated more than 1 million people^[1] at the end of 2021, according to Bureau of Justice Statistics data. To house them, state governments spent a combined $64.0 billion (inflation-adjusted). Spending per prisoner varies more than tenfold across states, from just under $23,000 per person in Arkansas to $307,468 in Massachusetts. Spending in Massachusetts was more than double any other state; the median state spent $64,865 per prisoner for the year.