Federal Inmate Locator: How the BOP Search Works
The federal inmate locator is the Bureau of Prisons search tool for people in federal custody. It covers federal inmates incarcerated from 1982 to the present and lets you search by name or by a federal register number. It does not cover state or county custody, and it may not show federal defendants still held by the U.S. Marshals Service.
What the federal inmate locator is
The federal inmate locator is a public search run by the Federal Bureau of Prisons, the agency that manages federal prisons. It is designed to locate a person in federal custody, and the agency states that it covers people incarcerated from 1982 to the present. You can search by name or by a number, and the result shows the person's register number, age, race, sex, release date, and facility when they are in Bureau custody.
Because it is an agency record, the locator carries the authority of the office that holds the person. The federal prisoner records guide at USA.gov points to the same tool and explains that older federal records, from before 1982, are held by the National Archives rather than the Bureau. That split matters if you are looking for a much older case.
How federal custody differs from state custody
Federal custody is a separate system from state and county custody. A federal case is filed in a U.S. district court, prosecuted by a U.S. attorney, and, after sentencing, the person is designated to a federal facility run by the Bureau of Prisons. State cases stay in state courts and state corrections systems. The two systems do not share one search, and a name that appears in a state offender search will not appear in the federal locator unless the person was in federal custody.
The Bureau describes itself as the agency responsible for the custody and care of federal inmates, and it publishes a list of its facilities. Federal facilities are located across the country, and a person can be designated to a facility far from the court where the case was filed. The locator is the way to find out where a person in federal custody is being held.
What the locator covers
Knowing the edges of the tool saves time. The locator is strong for some searches and silent for others.
| Search situation | Does the locator cover it? |
|---|---|
| Federal inmate incarcerated from 1982 to the present | Yes |
| Former federal inmate released since 1982 | Yes, shown as released or not in custody |
| State prison inmate | No |
| County jail detainee | No |
| Federal defendant still held by the U.S. Marshals Service | Not always; may not appear until designated |
| Federal records from before 1982 | No; held by the National Archives |
What the locator does not cover
The locator does not cover state prisons, county jails, or local detention facilities. It also does not cover every person connected to a federal case. A federal defendant awaiting trial is usually held by the U.S. Marshals Service, and the Bureau notes that a person can be in the custody of another correctional or criminal justice system. If the locator shows released or not in custody with no facility, the person is no longer in Bureau custody, but that does not mean every case is closed. The person could be on supervised release, in state custody, or facing a separate charge.
How to search by number and by name
The locator accepts a Bureau of Prisons register number and several other numbers, including an FBI number. A register number follows a standard format and returns a precise match. A name search accepts a first and last name, with optional middle name, race, age, and sex filters. If a name search returns nothing, try a few things before assuming the person is not in custody.
- Try alternate spellings and add a middle name or initial.
- Check whether the person might be in state or county custody instead.
- Confirm the register number format if you are searching by number.
- Check the federal court docket for the case status.
Why a release date can change
A release date in the locator is a projection, not a promise. The Bureau notes that sentences are reviewed and recalculated under the First Step Act, and that a release date shown may not be up to date. Good time credit, program credits, and court orders can move a date earlier or later. Treat the date as the agency's current estimate and check back periodically rather than relying on a single snapshot.
Finding the federal court record
The locator shows custody, not the case. For charges, plea, sentence, and hearing dates, go to the federal court record. The federal courts let the public find a case through the PACER system or by visiting the courthouse where the case was filed. The federal rules of criminal procedure govern how a federal case moves from arrest through sentencing, which helps explain why a person can be in one system at one stage and another later.
Where this varies
Where this varies: federal detention before trial is run differently from state pretrial detention, and the agency holding a federal defendant can change as the case moves. The Bureau of Prisons handles sentenced inmates, while the U.S. Marshals Service handles many people in pretrial federal custody. Confirm which agency has custody before assuming a missing name means a released person.
Getting more detail through a records request
The public locator shows a limited profile. For more detail, the Bureau accepts Freedom of Information Act requests, and it lists which records are available online. A person requesting their own records must confirm identity so private records are not disclosed to someone else. If you need the full case history rather than custody status, the court record is the better source, because it holds the filings and orders that the locator does not.
Official starting points
The Bureau of Prisons locator is the primary public tool for federal custody, and the agency also publishes a list of its facilities. For the case itself, the federal court record is the source for charges and sentences, and older federal prison records are held by the National Archives rather than the Bureau. Each source is run by the office that holds the record, which is why the locator, the court, and the archives answer different questions.
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Frequently asked questions
What years does the federal inmate locator cover?
The Bureau of Prisons locator covers people incarcerated from 1982 to the present, including former inmates released since then. Federal records from before 1982 are held by the National Archives and are not in the locator.
Does the locator show state or county inmates?
No. The locator covers federal custody only. State prison inmates appear in a state department of corrections offender search, and county jail detainees appear on a county roster. Each system keeps its own records.
Why is a federal defendant not showing up in the locator?
Federal defendants awaiting trial are often held by the U.S. Marshals Service rather than the Bureau of Prisons, so they may not appear until they are designated to a federal facility. A missing name does not always mean the person is not in federal custody.
What does a released or not in custody result mean?
It means the person is no longer in Bureau of Prisons custody. They could be on supervised release, in state or local custody, or connected to another case. The Bureau advises checking other systems before assuming the person has no further obligations.
Why does the release date keep changing?
The date shown is a projection. The Bureau notes that sentences are reviewed and recalculated under the First Step Act, and credits or court orders can move a date. Check back periodically rather than treating one date as final.
Where do I find the federal charges and sentence?
Use the federal court record. The public can find a case through PACER or by visiting the courthouse where it was filed. The locator shows custody and facility, while the court record holds the charges, plea, and sentence.
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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