Solitary Confinement: What Segregation Means in Custody
Solitary confinement, also called segregation or restrictive housing, separates an incarcerated person from the general population and restricts out-of-cell time and contact. It is a housing status set by corrections agency rules, not a sentence imposed by a judge. It is used for discipline, safety, and investigation, and is subject to court, state, and federal oversight.
Solitary confinement — also called segregation or restrictive housing — is the practice of separating an incarcerated person from the general population and holding them with little or no contact with others. A person in segregation typically stays in a single cell for most of the day, eats meals there, and has limited out-of-cell time for recreation, showers, or programs. Facilities use many names for the practice: the hole, disciplinary detention, administrative segregation, the special housing unit, and restrictive housing all describe variations on the same idea.
Segregation is not a sentence imposed by a judge. It is a housing status managed by a corrections agency under the agency's own rules. A court decides whether someone goes to prison and for how long; where that person lives inside the prison — general population, a work unit, a treatment unit, or a segregated unit — is generally an administrative decision made by the facility or the state department of corrections.
Because the conditions are restrictive, segregation is among the most closely examined areas of corrections practice. Federal courts, state legislatures, and the Civil Rights Division of the U.S. Department of Justice have all looked at how and when it is used. The sections below explain the terminology, the common reasons for placement, and the review mechanisms that exist.
What segregation means in practice
Two features usually define a placement as segregation: separation from the general population, and limits on out-of-cell time and contact that are tighter than in ordinary incarceration. Beyond those features, conditions differ widely between systems.
- Single-cell housing. Most segregation units hold one person per cell.
- Limited movement. Out-of-cell time is typically brief and often takes place in an individual recreation pen.
- Restricted contact. Visits, telephone calls, and mail may be curtailed or conducted through a barrier.
- Fewer privileges. Personal property, commissary access, and programming are commonly reduced.
- Escorted movement. When a person leaves the cell, restraints and escort procedures are standard.
Segregation is not the same as protective custody, which is separation arranged because a person is believed to be at risk of harm in the general population. The housing may look similar, but the stated purpose is different, and the review process often differs as well.
When segregation is used
Disciplinary segregation
This follows a finding that an incarcerated person violated facility rules — fighting, possessing contraband, or refusing a direct order, for example. It is imposed after an internal disciplinary hearing and lasts for a period set by the agency's written rules.
Administrative segregation
Often shortened to ad-seg, and sometimes called investigative status, this placement is not a punishment for one specific violation. It is used when staff conclude that a person poses a safety or security risk, or while an investigation is pending. Because it is not tied to a fixed disciplinary term, administrative segregation can be open-ended — which is why it is usually the type subject to periodic review.
Protective custody
A person may be placed in protective custody at their own request or at staff initiative when they are likely to be harmed by others. Some systems house protective custody in the same units as administrative segregation; others maintain separate areas with different rules.
Medical and mental health units
Some facilities operate specialized units for people with serious mental illness or significant medical needs. These placements may still involve separation, and courts and oversight bodies have examined whether such settings are appropriate given a person's condition.
How a placement is decided
Disciplinary placements ordinarily involve written notice of the alleged violation, an opportunity to respond, and a written decision, with an internal appeal available in many systems. Administrative placements generally rest on staff classification rather than an adversarial hearing. The level of procedural protection depends on the jurisdiction and on whether the placement imposes what courts describe as an atypical and significant hardship compared with ordinary prison life. The Cornell Legal Information Institute explains the due process framework that applies to government decisions, including those inside institutions.
Conditions themselves are governed by the Eighth Amendment, which prohibits cruel and unusual punishment. Courts have held that conditions must not deprive a person of basic human needs and that deliberate indifference to serious medical needs violates the Constitution. The Administrative Office of the U.S. Courts describes how federal criminal cases proceed, though challenges to conditions of confinement are generally civil rights claims rather than criminal matters.
Because long-term segregation can continue without a fixed end date, many systems require periodic review by a classification committee or administrator who re-evaluates whether continued placement is justified. The review interval, the composition of the reviewing body, and the criteria used are set by agency policy or state law.
Oversight and review mechanisms
- Federal courts. Civil rights lawsuits by incarcerated people test whether placement procedures and conditions meet constitutional minimums, and class-wide litigation has produced consent decrees governing segregation in several state systems.
- State statutes and administrative codes. Many states set review timelines, duration limits, or mental health exclusions in law or regulation.
- Independent oversight bodies. Some states maintain an ombudsman, inspector general, or correctional audit office that inspects facilities and publishes findings.
- U.S. Department of Justice. The Civil Rights Division investigates conditions in prisons and jails, including segregation practices, and may enter agreements or file suit.
- Legislative oversight. State and federal legislative committees can request data and hold hearings on segregation practices.
| Label | Typical trigger | Usual decision-maker |
|---|---|---|
| Disciplinary segregation | Finding of a rule violation after a hearing | Disciplinary hearing officer |
| Administrative segregation | Security risk or pending investigation | Classification staff or warden's designee |
| Protective custody | Belief that the person is at risk of harm | Classification staff, sometimes at the person's request |
| Specialized medical or mental health unit | Clinical need combined with separation | Medical or mental health staff with security staff |
Public information and records
Corrections agencies publish their disciplinary and housing policies to varying degrees. Some post policy manuals online; others release them only in response to a public records request. National corrections data are collected by the Bureau of Justice Statistics, which publishes reports on correctional populations and facility operations. For federal inmates, the Federal Bureau of Prisons inmate locator shows the facility where a person is held, but it does not indicate housing status within that facility. Because contact is often restricted during segregation, the Federal Communications Commission publishes consumer information on inmate telephone service and its rules.
Where this varies
Almost every detail of segregation practice is set at the state or facility level. The terminology differs: one system's administrative segregation is another's restrictive housing or close custody. The triggers differ, as do duration limits, review intervals, the weight given to mental health history, the availability of an administrative appeal, and whether protective custody is housed separately from disciplinary units. Federal facilities operate under Bureau of Prisons program statements, while state prisons and local jails follow their own statutes, administrative codes, and policies. Some systems have adopted statutory caps or review requirements; others rely on internal policy alone. Court oversight also varies, since consent decrees and settlements apply only to the systems named in those cases. Because of this, the only reliable description of practice at a particular facility is that facility's current written policy, read together with the governing state law.
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Frequently asked questions
Is solitary confinement a punishment ordered by a judge?
Generally no. A judge imposes a sentence, such as a prison term, but housing placement inside a facility is usually an administrative decision. Segregation is imposed through a corrections agency's own disciplinary or classification process, which is why its procedures and limits appear in agency policy and state regulation rather than in a criminal judgment.
How long can someone be held in segregation?
It varies. Disciplinary segregation is tied to a term set in the agency's rulebook, while administrative segregation can be open-ended. Many systems require periodic review of continued placement, and some states set limits or review intervals by statute or regulation. There is no single national rule governing duration.
What is the difference between segregation and protective custody?
Protective custody separates a person believed to be at risk of harm from others, sometimes at the person's own request. Segregation for discipline or security reasons also separates a person, but the stated purpose is punishment or risk management rather than protection. The housing may look similar, but review and release criteria commonly differ.
Who oversees segregation practices?
Federal courts review constitutional challenges to conditions and procedures, state legislatures and agencies set rules, and independent ombudsman or inspector general offices inspect facilities in some states. The U.S. Department of Justice Civil Rights Division can investigate conditions in prisons and jails and enter agreements or file suit.
Can someone with a mental illness be placed in segregation?
It depends on the jurisdiction. Some states restrict or prohibit segregation for people with serious mental illness, or require clinical review before and during placement. Others have fewer limits. Federal investigations have examined the use of segregation for people with mental illness, and courts have considered whether such placements violate constitutional standards.
How can I find out where someone is housed?
Public inmate locators, such as the Federal Bureau of Prisons locator, typically show the facility where a person is held but not their housing unit or status. State and local agencies often treat housing assignments as internal records. A public records request to the agency may be the way to obtain policy documents or other non-exempt information.
Written and reviewed by the InmateSearch.co Editorial Team. This page describes how the process generally works and is not legal advice.
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