"What is the difference between jail and prison?

Jail and prison are two distinct types of correctional facilities that serve different purposes, house different populations, and operate under different authorities.

Jails are locally operated, typically run by a county sheriff or a city government. They are designed for short-term detention and house two main groups: people who have been arrested and are awaiting trial or sentencing, and people serving shorter sentences, usually less than a year, for misdemeanor convictions. Jails are the first stop in the correctional system and are where most people land immediately after an arrest.

Prisons are operated by state governments or the federal Bureau of Prisons and are designed for longer-term incarceration. People end up in prison after they have been convicted of a felony and sentenced to a term typically exceeding one year. State prisons house people convicted of state crimes. Federal prisons house people convicted of federal offenses. Both systems classify inmates by security level and assign them to facilities that match their risk profile.

The practical differences extend beyond just the length of stay. Jails tend to have fewer programs, more limited educational opportunities, and higher turnover in the population since people come and go quickly. Prisons are more structured environments with established programming, work assignments, and longer-term community dynamics among the inmate population.

For families, understanding which type of facility a loved one is in matters for knowing who to contact, what services are available, and what the communication options look like. InmateAid works with both jails and prisons across all 50 states.