What Is Immigration Prison? ICE Custody, Bond, and Release

ICE detention is the civil custody system the federal government uses to hold noncitizens while their immigration cases move through the courts or while removal from the country is arranged. It is run by Immigration and Customs Enforcement, an agency inside the Department of Homeland Security, and during fiscal year 2026 it held tens of thousands of people on any given day. The facilities look like jails, but legally the purpose is not to punish anyone. It is to keep the person available for hearings or deportation.

That civil label shapes almost everything about how the system treats the people inside it, from whether they get a lawyer to how they can get out.

Why the “Civil” Label Matters

Because immigration detention is administrative rather than criminal, the constitutional protections built into the criminal system do not apply. There is no Sixth Amendment right to a government-appointed attorney, no speedy trial clock, and no jury. Bond works in reverse of criminal bail: the detained person generally carries the burden of showing they deserve release, rather than the government showing they need to be held.

The rules governing daily conditions come from ICE’s own detention standards, not correctional law. That is why finding out which type of facility someone is in tells you a lot about what to expect: an ICE-run Service Processing Center or a dedicated facility built for immigration detainees usually tracks those standards more closely than a county jail that leases a few beds to ICE and mixes immigration detainees with its regular population.

Who ICE Detains

Federal law splits detainees into two groups, and the split controls whether release on bond is even on the table.

Mandatory Detention

Some people must be held with no option for a standard bond hearing. Under 8 U.S.C. § 1225(b)(2)(A), arriving noncitizens at a port of entry who cannot prove they are “clearly and beyond a doubt” entitled to admission are detained for the length of their removal proceedings.¹

A separate provision, 8 U.S.C. § 1226(c), requires ICE to detain people with certain criminal histories when they are released from criminal custody. The triggering offenses include crimes involving moral turpitude, drug offenses, aggravated felonies, firearms violations, and certain national security-related charges.² In Jennings v. Rodriguez (2018), the Supreme Court confirmed that these statutes do not require the government to offer periodic bond hearings no matter how long detention continues.³

Discretionary Detention

Everyone else falls under 8 U.S.C. § 1226(a). ICE can detain, release on bond with a statutory minimum of $1,500, or release on conditional parole.² ICE sets the initial bond amount or denies bond, and the detainee can then ask an immigration judge to revisit that decision.

How Long Someone Can Be Held

There is no hard statutory ceiling on detention during ongoing removal proceedings. Once a final removal order is issued, the government gets a 90-day removal period to carry out the deportation.⁴ If removal cannot happen inside that window, the statute allows continued detention for people with criminal histories or those the agency considers a flight risk.

The Supreme Court capped that authority in Zadvydas v. Davis (2001). Post-removal-order detention can last only as long as reasonably necessary to accomplish removal, and six months is the presumptive reasonable period. After six months, if a detainee can show there is no significant likelihood of removal in the foreseeable future, the government must either justify continued detention or release the person under supervision.⁵ This is the main protection against indefinite immigration detention.

Finding Someone in ICE Custody

ICE runs the Online Detainee Locator System at locator.ice.gov. It is the only public tool for locating someone in ICE custody, and it also covers people who have been in Customs and Border Protection custody for more than 48 hours.⁶

You can search two ways:

By A-Number and country of birth. The Alien Registration Number is the unique identifier DHS assigns to noncitizens. It can be seven, eight, or nine digits, but the locator requires exactly nine, so pad shorter numbers with leading zeros. The A-Number appears on the Notice to Appear, work permits, and other immigration paperwork.⁷
By name and country of birth. First and last names must match ICE’s records exactly, and hyphenated last names must include the hyphen. Date of birth is optional but improves accuracy.

The locator does not return results for anyone under 18. To find a minor, you have to contact ICE directly or work through an attorney. Recent transfers between facilities can also show outdated locations for a period after the move.

Contacting a Detainee

Rules for visits, phone calls, and mail vary by facility. There is no single national policy, so start with the facility’s page on the ICE website or a call to its front desk for current visitor information.

Phone Calls

Most facilities route calls through a contracted vendor. ICE’s current provider is Talton Communications.⁸ Families usually need to set up a prepaid account with the vendor before the detainee can make outbound calls. Calls to attorneys and legal service providers on the facility’s approved list cannot be restricted, and detainees must get a reasonable degree of privacy for those legal calls.

Sending Money

Detainees can use commissary accounts for hygiene products, snacks, and similar items. Deposit methods differ by facility: some take money orders and cashier’s checks by mail, others use electronic services like Western Union. Personal checks and cash are generally not accepted. Confirm the specific deposit instructions with the facility before sending anything, because federally operated sites and contractor-run sites handle money differently.

Consular Contact

Under the Vienna Convention on Consular Relations, a detained foreign national has the right to contact their country’s consulate, and detaining authorities must inform the person of that right without delay. This applies to immigration detention just as it does to criminal custody. Consular officers can check on the person’s welfare, help arrange legal representation, and make sure their government knows they are being held.

Getting Released

How someone gets out depends entirely on which detention category they fall under.

Bond Hearings

People in discretionary detention under § 1226(a) can ask an immigration judge to set a bond amount. The judge looks at two questions: whether the person is a danger to the community, and whether they are likely to appear at future court dates. Community ties, family in the area, a clean record, and eligibility for some form of immigration relief all help. The statutory minimum is $1,500, and judges commonly set amounts between $7,000 and $10,000.² There is no upper limit, and bonds of $25,000 or more are not unusual when there is criminal history or a perceived flight risk.

Parole

Arriving noncitizens who cannot request a standard bond hearing may ask for parole. The standard is narrow. The person must show urgent humanitarian reasons, such as a serious medical condition, pregnancy, or status as an unaccompanied minor, or that release serves a significant public benefit.⁹ Parole is granted case by case and can be revoked at any time.

Orders of Supervision

When someone has a final removal order but cannot actually be deported, because their home country will not accept them or travel documents are unavailable, ICE may release the person on an Order of Supervision. The person lives in the community but reports to ICE on a set schedule, sometimes with an ankle monitor, and complies with any conditions the agency sets.¹⁰ This is the release path tied most directly to the Zadvydas six-month presumption.

Paying and Recovering a Bond

Bond payments run through ICE’s CeBONDS system and must be made by Fedwire or ACH transfer. Cash, personal checks, and money orders are not accepted.¹¹ The person posting bond does not need to be a U.S. citizen, but they must be lawfully present in the United States and able to complete the transfer. ICE publishes a list of Enforcement and Removal Operations offices that accept bonds, with locations across the country including Puerto Rico and Guam.¹²

An immigration bond is fully refundable once the case ends, whether the person is granted status or deported. ICE mails a cancellation notice (Form I-391) to the bond obligor, who then sends it along with the original bond receipt to the DHS Debt Management Center. Refunds generally take about four weeks. If the original receipt is lost, the obligor completes and notarizes an affidavit (Form I-395) before submitting the refund request. Families who use a private bond company instead of paying the full amount themselves pay a non-refundable premium, and that premium does not come back regardless of how the case ends.

Alternatives to Detention

Not everyone in removal proceedings is held in a facility. ICE’s Alternatives to Detention program, run through the Intensive Supervision Appearance Program (ISAP), lets certain adults live in the community under monitoring while their cases proceed.¹³

ICE weighs criminal and immigration history, family and community ties, caregiver responsibilities, and medical or humanitarian circumstances when deciding who qualifies. The monitoring uses one of three technologies:

GPS ankle or wrist devices that track location by satellite. As of late 2024, fewer than 10% of ISAP participants wore one.
The SmartLINK phone app, which uses facial recognition to verify identity at check-in and captures a single GPS point at login. It does not continuously track location or read personal data on the phone.
Telephonic reporting, where the participant calls in and voice biometrics confirm identity against a voiceprint taken at enrollment.

Missing a check-in or breaking program rules raises the risk of being taken back into physical custody. ICE officers can escalate a participant from the app to a GPS device, or from any monitoring level back to full detention, based on compliance.¹³

Legal Help Inside Detention

This is where immigration detention diverges most sharply from the criminal system. Nobody is assigned a lawyer if they cannot pay. Detainees can hire an attorney at their own expense, but the government always has trained counsel on the other side, and the majority of detained people end up representing themselves.

ICE standards require facilities to provide a law library with updated immigration legal materials and at least five hours of library access per week, with priority for anyone facing a court deadline. Facilities must also help people who do not speak English or cannot read work with the materials, though the quality of that help varies from one facility to the next.

The federal Legal Orientation Program, which had provided free legal information sessions and one-on-one guidance at dozens of facilities, was terminated in April 2025. It had helped detained individuals understand the court process, spot potential defenses, and find pro bono attorneys.

Medical Care and Complaints

The ICE Health Service Corps (IHSC) oversees health care across detention facilities. At ICE-staffed sites, IHSC directly provides medical services through physicians, nurses, psychiatrists, psychologists, dentists, and social workers. At contractor-run and IGSA facilities, IHSC audits compliance with detention health standards and reimburses for off-site care the facility cannot provide.¹⁴

The Performance-Based National Detention Standards set the baseline for conditions across facility types, covering medical care, nutrition, safety, recreation, and legal materials.¹⁵ A detainee who believes care is being denied or who is experiencing mistreatment can use the facility’s grievance process, and medical grievances have their own tighter timelines for review and response.¹⁶ Unsatisfactory responses can be appealed to ICE headquarters.

Detainees and their families can also report staff misconduct, civil rights violations, or unsafe conditions to ICE’s Office of Professional Responsibility, which investigates allegations against ICE employees and contractors. Complaints go through the OPR webform, by phone at 833-442-3677, or by email at ICEOPRIntake@ice.dhs.gov.¹⁷ The DHS Office of Inspector General accepts broader accountability complaints at 800-323-8603. Sexual abuse and assault allegations fall under ICE’s zero-tolerance policy and the Prison Rape Elimination Act, with reporting channels at every facility.¹⁸

1
Office of the Law Revision Counsel. 8 USC 1225 – Inspection by Immigration Officers; Expedited Removal of Inadmissible Arriving Aliens; Referral for Hearing
2
Office of the Law Revision Counsel. 8 USC 1226 – Apprehension and Detention of Aliens
3
Justia Law. Jennings v Rodriguez, 583 US (2018)
4
Office of the Law Revision Counsel. 8 USC 1231 – Detention and Removal of Aliens Ordered Removed
5
Legal Information Institute. Zadvydas v Davis, 533 US 678 (2001)
6
U.S. Immigration and Customs Enforcement. Online Detainee Locator System
7
U.S. Citizenship and Immigration Services. A-Number/Alien Registration Number/Alien Number
8
Immigration and Customs Enforcement. ICE Communication Services
9
eCFR. 8 CFR 212.5 – Parole of Aliens Into the United States
10
U.S. Immigration and Customs Enforcement. ICE Form I-220B – Order of Supervision
11
U.S. Immigration and Customs Enforcement. Post a Bond
12
U.S. Immigration and Customs Enforcement. ICE ERO Bond Acceptance Facilities
13
U.S. Immigration and Customs Enforcement. Alternatives to Detention
14
U.S. Immigration and Customs Enforcement. ICE Health Service Corps
15
U.S. Immigration and Customs Enforcement. 2011 Operations Manual ICE Performance-Based National Detention Standards
16
U.S. Immigration and Customs Enforcement. Grievance System
17
Immigration and Customs Enforcement. Office of Professional Responsibility
18
U.S. Immigration and Customs Enforcement. ICE Sexual Abuse and Assault Prevention and Intervention Program